Projects

Projects

HORIZON 2020 - Space-borne observatIons for detectIng and forecastIng sea Ice cover extremes (SPICES) - 2015

Ongoing climate warming has manifested as shrinking and thinning of pack ice in the Arctic. This is a primary driver for the increasing shipping, oil and gas explorations and mining activities in the Arctic. However, severe sea ice conditions still exist and in consequence many locations are impossible for ship based operations. Moreover, year-to-year variability of sea ice is very large and hazardous multi-year ice floes sometimes appear also in typically seasonally ice free regions.

In order to response needs of increase polar activities, SPICES is focusing on detection of sea ice extremes an In particular, we aim for:

  • detection of heavily ridged ice regions from SAR,
  • detection of MYI floes in a area composed mostly FY from SAR,
  • detection of most thickest ice from RA thickness profiles,
  • detection of regionally anomalous thick or thin ice via SMOS data,
  • detection of sea ice areas vulnerable for the wave action,
  • detection of early/late melting season and
  • improving capabilities to forecast seasonal sea ice extremes.

Total budget: 2,995,678.00 Euro

For detailed information please check project’s website.

ITU BAP - Antarktik Weddell Denizi Buzu Kalınlıklarının Yersel Ölçümler ve ICESat-1 Lazer Altimetre Uydusu ile Tespiti - 2015

Bu çalışmada, Antarktik buz denizinde, kar kalınlığını elde etmek amacıyla alternatif bir yöntem uygulanacaktır. Bu çalışma, Antarktik buzullarında gerçekleştirilen sondaj verilerinden geliştirilen deneysel bağlantılar kullanacaktır (Ozsoy-Cicek ve diğerleri, 2013). Bu bağlantılar, kar kalınlığının, ICESat tarafından sağlanan freeboard ölçümlerinden elde edilebileceğini önermektedir. Bu çalışmada, kar kalınlığı, üç değişik deneysel bağlantı kullanılarak, 20 derece doğuya kadar Weddel Denizi için elde edilen ICESat freeboard üzerinden hesaplanacaktır (Ozsoy-Cicek ve diğerleri, 2013). Sonuçlar, güncel mikro-dalga radyometresinden elde edilen buz denizindeki kar kalınlığı ve kar kalınlığına ilişkin ASPeCt (Antarctic Sea Ice Processes & Climate) protokolü gemi tabanlı görsel tahminleri ile karşılaştırılacaktır (Worby ve Allison, 1999).

Toplam bütçe: 14.000 TL

ITU BAP - Antarktika Çevre Protokolü ve Arktik Konseyine Üyelik Çerçevesinde Çevresel Faktörlerin Belirlenmesi, Buna Bağlı Denizcilik Politikalarının Geliştirilmesi Modellenmesi

Bu çalışma ile Kutup Bölgelerinde çevrenin korunması, iklim değişiklikleri ve çevresel değişiklikler ve bunların etkileri belirlenecektir. Sonrasında ise Türkiye Cumhuriyeti’nin Kutup Bölgelerine olan ilgisi, mevcut hukuki durum, Türkiye Cumhuriyeti’nin Arktik Konseyi’ne başvuru süreci ve yine Antarktik Antlaşmalar Sistemi içerisinde yer alan Çevre Protokolü’nü imzalama süreci bağlamında değerlendirilerek, ne tür bir denizcilik politikası geliştirilmesi, oluşturulması ve yerleştirilmesi gerektiği disiplinlerarası çalışma ile modellenecektir.

Toplam bütçe: 19.000 TL

Publications

Towards the Turkish Antarctic Science Programme

Antarctica and the Southern Ocean are presently dedicated to science and peace. Even though Turkey signed the Antarctic Treaty in 1995, it has not conducted any scientific study there until today. The First Turkish Antarctic Science Program Road Map Workshop was held on 18-19 November 2013 in Istanbul with the participation of national stakeholders and international experts from various countries to discuss the Turkish initiative for Antarctic research. The present paper summarizes the outcome of this workshop.

http://www.blackmeditjournal.org/pdf/92-95-Vol20No1-Ozturk.pdf

Antarctic summer sea ice concentration and extent: comparison of ODEN 2006 ship observations, satellite passive microwave and NIC sea ice charts

Antarctic sea ice cover has shown a slight increase (<1%/decade) in overall observed ice extent as derived from satellite mapping from 1979 to 2008, contrary to the decline observed in the Arctic regions. Spatial and temporal variations of the Antarctic sea ice however remain a significant problem to monitor and understand, primarily due to the vastness and remoteness of the region. While satellite remote sensing has provided and has great future potential to monitor the variations and changes of sea ice, uncertainties remain unresolved. In this study, the National Ice Center (NIC) ice edge and the AMSR-E (Advanced Microwave Scanning Radiometer-Earth Observing System) ice extent are examined, while the ASPeCt (Antarctic Sea Ice Process and Climate) ship observations from the Oden expedition in December 2006 are used as ground truth to verify the two products during Antarctic summer. While there is a general linear trend between ASPeCt and AMSR-E ice concentration estimates, there is poor correlation (R2=0.41) and AMSR-E tends to underestimate the low ice concentrations. We also found that the NIC sea ice edge agrees well with ship observations, while the AMSR-E shows the ice edge further south, consistent with its poorer detection of low ice concentrations. The northward extent of the ice edge at the time of observation (NIC) had mean values varying from 38 km to 102 km greater on different days for the area as compared with the AMSR-E sea ice extent. For the circumpolar area as a whole in the December period examined, AMSR-E therefore may underestimate the area inside the ice edge at this time by up to 14% or, 1.5 million km2 less area, compared to the NIC ice charts. Preliminary comparison of satellite scatterometer data however, suggests better resolution of low concentrations than passive microwave, and therefore better agreement with ship observations and NIC charts of the area inside the ice edge during Antarctic summer. A reanalysis data set for Antarctic sea ice extent that relies on the decade long scatterometer and high resolution satellite data set, instead of passive microwave, may therefore give better fidelity for the recent sea ice climatology.

Burcu Ozsoy-Cicek, H. Xie, S. F. Ackley, K. Ye, “Antarctic summer sea ice concentration and extent: comparison of ODEN 2006 ship observations, satellite passive microwave and NIC sea ice charts”, The Cryosphere Discussion (TCD), 2009, s. 623–647, ISSN: doi:10.5194/tc-3-1-2009
http://www.the-cryosphere.net/

Antarctic sea ice extents and concentrations: Comparison of satellite and ship measurements from IPY cruises

Antarctic Sea Ice Processes and Climate (ASPeCt) ship-based ice observations, conducted during the Sea Ice Mass Balance in the Antarctic (SIMBA) and Sea Ice Physics and Ecosystem eXperiment (SIPEX) International Polar Year (IPY) cruises (September–October 2007), are used to validate remote-sensing measurements of ice extent and concentration. Observations include varied sea-ice types at and inside the ice edge of West (∼90° W) and East (∼120° E) Antarctica. Time series of Advanced Microwave Scanning Radiometer–Earth Observing System (AMSR-E) ice extents and US National Ice Center (NIC) ice edges were obtained for the 2007–08 periods bracketing the period these cruises were conducted. A comparison between passive microwave satellite imagery and ASPeCt observations of sea-ice concentration during two cruises was also performed. In 90° W regions, the concentrated pack ice indicated good correlation between ship observations and passive microwave estimates of the ice concentration (R 2 = 0.80). In the marginal zone of West Antarctica and over nearly the entire sea-ice zone of East Antarctica, correlation dropped to R 2 < 0.60. These findings are consistent with other studies comparing passive microwave and ship observations and further verify that the East Antarctic sea-ice zone is more marginal in character. There are significant ice-edge differences between AMSR-E and NIC between late November 2007 and early March 2008 such that the AMSR-E sea-ice extent estimate is 1–2 × 106 km2 less than the NIC estimate.

Burcu Ozsoy-Cicek, S. F. Ackley, A. Worby, H. Xie, J. Lieser, “Antarctic sea ice extents and concentrations: Comparison of satellite and ship measurements from IPY cruises”, Annals of Glaciology, Vol. 52, No. 57, 2011, s. 318-326, ISSN: 0260-3055 doi:10.3189/172756411795931877, Annals of Glaciology,

http://www.igsoc.org/journal/

An intercomparison between AMSR-E snow depth and satellite C- and Ku-Band radar backscatter data for Antarctic sea ice

Advanced Microwave Scanning Radiometer (AMSR-E) snow-depth data for Antarctic sea ice are compared with ship-based visual observations of snow depth, ice type and ridged-ice fraction, and with satellite C-band and Ku-band radar backscatter observations for two ship cruises into the Weddell Sea (ISPOL 2004–05, WWOS 2006) and one cruise into the Bellingshausen Sea (SIMBA 2007) during late winter/spring. Most (>75%) AMSR-E and ship-based snow-depth observations agree within 0.2 m during WWOS and SIMBA. Remaining observations indicate substantial underestimations of snow depths by AMSR-E data. These underestimations tend to increase with the ridged-ice fraction for WWOS and SIMBA. In areas with large snow depths, a combination of relatively stable low C-band radar backscatter and variable Ku-band radar backscatter is associated with undeformed first-year ice and may indicate snow metamorphism at this time of year during SIMBA. In areas with small snow depths, a combination of relatively stable low Ku-band radar backscatter, high C-band radar backscatter and low C-band radar backscatter standard deviations is associated with rough first-year ice during SIMBA. This information can help to better understand causes of the observed AMSR-E snow-depth bias during late-winter/spring conditions with decreasing average snow depth and to delineate areas where this bias occurs.

S. Kern, B. Ozsoy-Cicek, S. Willmess, M. Nicolaus, S. F. Ackley, C. Haas, “An intercomparison between AMSR-E snow depth and satellite C- and Ku-Band radar backscatter data for Antarctic sea ice”, Annals of Glaciology, Vol. 52, No. 57, 2011, s. 279-290, ISSN: 0260-3055 doi:10.3189/172756411795931750, Annals of Glaciology,

http://www.igsoc.org/journal/

Monitoring sea ice by ASAR and validating with cruise field data for Antarctica

Envisat Advanced Synthetic Aperture Radar (ASAR) Wide Swath Mode (WSM) images are used to derive C-band HH-polarization normalized radar cross sections (NRCS). These are compared with ice-core analysis and visual ship-based observations of snow and ice properties observed according to the Antarctic Sea Ice Processes and Climate (ASPeCt) protocol during two International Polar Year summer cruises (Oden 2008 and Palmer 2009) in West Antarctica. Thick first-year (TFY) and multi-year (MY) ice were the dominant ice types. The NRCS value ranges between –16.31.1 and –7.61.0 dB for TFY ice, and is –12.61.3 dB for MY ice; for TFY ice, NRCS values increase from –15 dB to –9 dB from December/January to mid-February. In situ and ASPeCt observations are not, however, detailed enough to interpret the observed NRCS change over time. Co-located Advanced Microwave Scanning Radiometer–Earth Observing System (AMSR-E) vertically polarized 37GHz brightness temperatures (TB37V), 7 day and 1 day averages as well as the TB37V difference between ascending and descending AMSR-E overpasses suggest the low NRCS values (–15 dB) are associated with snowmelt being still in progress, while the change towards higher NRCS values (–9 dB) is caused by commencement of melt-refreeze cycles after about mid-January.

A. E. Tekeli, S. F. Ackley, B. Ozsoy-Cicek, S. Kern, H. Xie, “Monitoring sea ice by ASAR and validating with cruise field data for Antarctica”, Annals of Glaciology, Vol. 57, No. 52, 2011, ISSN: 0260-3055 doi:10.3189/172756411795931697, Annals of Glaciology,

http://www.igsoc.org/journal/

Intercomparisons of Antarctic sea properties from ship observations, active and passive microwave satellite observations in the Bellingshausen Sea

Antarctic Sea Ice Processes and Climate (ASPeCt) ship-based ice observations, conducted during the Sea Ice Mass Balance in the Antarctic (SIMBA) and Sea Ice Physics and Ecosystem eXperiment (SIPEX) International Polar Year (IPY) cruises (September–October 2007), are used to validate remote-sensing measurements of ice extent and concentration. Observations include varied sea-ice types at and inside the ice edge of West (908 W) and East (1208 E) Antarctica. Time series of Advanced Microwave Scanning Radiometer–Earth Observing System (AMSR-E) ice extents and US National Ice Center (NIC) ice edges were obtained for the 2007–08 periods bracketing the period these cruises were conducted. A comparison between passive microwave satellite imagery and ASPeCt observations of sea-ice concentration during two cruises was also performed. In 908W regions, the concentrated pack ice indicated good correlation between ship observations and passive microwave estimates of the ice concentration (R2 = 0.80). In the marginal zone of West Antarctica and over nearly the entire sea-ice zone of East Antarctica, correlation dropped to R2 < 0.60. These findings are consistent with other studies comparing passive microwave and ship observations and further verify that the East Antarctic sea-ice zone is more marginal in character. There are significant ice-edge differences between AMSR-E and NIC between late November 2007 and early March 2008 such that the AMSR-E sea-ice extent estimate is 1–2106 km2 less than the NIC estimate.

B. Ozsoy-Cicek, S. Kern, S. F. Ackley, H. Xie, A. Tekeli, “Intercomparisons of Antarctic sea properties from ship observations, active and passive microwave satellite observations in the Bellingshausen Sea”, Deep Sea Research, Vol. 58, No. 9-10, 2011, s. 1092-1111, ISSN: 0967-0645 doi:10.1016/j.dsr2.2010.10.031, Elsevier,

http://www.journals.elsevier.com/deep-sea-research-part-ii-topical-studies-in-oc

Sea ice thickness retrieval algorithms based on in situ surface elevation and thickness values for application to altimetry

In situ measurements of sea ice thickness (I), snow depth (S), and snow freeboard (Fsn) from drilling profile lines from 15 cruises into the Southern Ocean, Antarctica, were analyzed. I was calculated from in situ Fsn and S using an isostatic approach. I was also directly estimated from Fsn as can be obtained from laser altimetry. The root-mean-square difference (RMSD) between observed and calculated I reduces, and the correlation between Fsn and Iincreases substantially, when (1) using values averaged over the survey lines (∼50 m) instead of single drill hole measurements (∼1 m) and (2) treating positive and negative sea ice freeboard (Fi) separately. For small Fi, however,Sapproximates Fsn pointing toward an isostatic balance also between S and I. Our linear regression analysis between the in situ measurements suggests a direct conversion of Fsn into I using a region-specific set of equations. RMSD values are similar to those obtained employing isostatic balance models and treating positive and negative Fi separately. However, more data would have been needed to obtain significant differences between most of the various models suggested. Still our new approach gives a viable alternative for AntarcticI retrieval from altimetric measurements of Fsn alone. Correlation between in situ observations of Fsn and S is high. RMSD between observed and calculatedSis small. This suggests estimation of S from altimetric Fsn measurements. Such Shas an estimated precision of ∼5 cm, and is neither affected by snow wetness or grain size nor limited to S < 50 cm.

Burcu Ozsoy-Cicek, S. F. Ackley, A. Worby, H. Xie, J. Lieser, “Antarctic sea ice extents and concentrations: Comparison of satellite and ship measurements from IPY cruises”, Annals of Glaciology, Vol. 52, No. 57, 2011, s. 318-326, ISSN: 0260-3055 doi:10.3189/172756411795931877, Annals of Glaciology

B. Ozsoy-Cicek, S. F. Ackley, H. Xie, D. Yi, J. Zwally, “Sea ice thickness retrieval algorithms based on in situ surface elevation and thickness values for application to altimetry”, Journal of Geophysical Research: Oceans, Vol. 118, No. 8, 2013, s. 3807-3822, ISSN: 2169-9275 doi: 10.1002/jgrc.20252,

http://onlinelibrary.wiley.com/journal/10.1002

1977 - 2014 Yayın Listesi

Merkez Yönetim Kurulu ve Danışma Kurulu üyelerinin Kutup Bölgeleri ile ilgi (1977 – 2014) yayın listesi 

 

  • Inan, U. S. (1977). Non—linear gyroresonant interactions of energetic particles and coherent vlf waves in the magnetosphere.

 

  • Inan, U. S., & Bell, T. F. (1977). The plasmapause as a VLF wave guide.Journal of Geophysical Research,82(19), 2819.

 

  • Helliwell, R. A., & Inan, U. S. (1982). VLF wave growth and discrete emission triggering in the magnetosphere: A feedback model.Journal of Geophysical Research: Space Physics87(A5), 3537-3550.

 

  • Inan, U. S., & Helliwell, R. A. (1982). DE-1 observations of VLF transmitter signals and wave-particle interactions in the magnetosphere. Res. Lett9, 917.

 

  • Carpenter, D. L., Inan, U. S., Trimpi, M. L., Helliwell, R. A., & Katsufrakis, J. P. (1984). Perturbations of subionospheric LF and MF signals due to whistler‐induced electron precipitation bursts.Journal of Geophysical Research: Space Physics89(A11), 9857-9862.

 

  • Sonwalkar, V. S., Bell, T. F., Helliwell, R. A., & Inan, U. S. (1984). Direct multiple path magnetospheric propagation- A fundamental property of nonducted VLF waves.Journal of Geophysical Research89, 2823-2830.

 

  • Rastani, K., Inan, U. S., & Helliwell, R. A. (1985). DE 1 observations of Siple transmitter signals and associated sidebands.Journal of Geophysical Research: Space Physics90(A5), 4128-4140.

 

  • Dejnakarintra, M., Inan, U. S., & Carpenter, D. L. (1985). Transient tropospheric electric fields resulting from sudden changes in ionospheric conductivity.Journal of Geophysical Research,90, 12.

 

  • Inan, U. S., & Carpenter, D. L. (1987). Lightning-induced electron precipitation events observed at L of about 2. 4 as phase and amplitude perturbations on subionospheric VLF signals.Journal of Geophysical Research92, 3293-3303.

 

  • Poulsen, W. L., Bell, T. F., & Inan, U. S. (1990). Three‐Dimensional modeling of subionospheric VLF propagation in the presence of localized D region perturbations associated with lightning.Journal of Geophysical Research: Space Physics95(A3), 2355-2366.

 

 

  • Helliwell, R. A., Mielke, T., & Inan, U. S. (1990). Rapid whistler‐mode wave growth resulting from frequency‐time curvature.Geophysical research letters,17(5), 599-602.

 

  • Inan, Umran S. “VLF heating of the lower ionosphere.”Geophysical Research Letters 6 (1990): 729-732.

 

  • Inan, U. S., Rodriguez, J. V., Lev-Tov, S., & Oh, J. (1992). Ionospheric modification with a VLF transmitter.Geophysical research letters19(20), 2071-2074.

 

  • Pasko, V. P., & Inan, U. S. (1994). Recovery signatures of lightning-associated VLF perturbations as a measure of the lower ionosphere.Journal of geophysical research99(A9).

 

  • Reising, S. C., Inan, U. S., Bell, T. F., & Lyons, W. A. (1996). Evidence for continuing current in sprite‐producing cloud‐to‐ground lightning.Geophysical Research Letters23(24), 3639-3642.

 

  • Inan, U. S, Reising, S. C., Fishman, G. J., & Horack, J. M. (1996). On the association of terrestrial gamma-ray bursts with lightning and implications for sprites.Geophysical Research Letters23(9), 1017-1020.

 

  • Enge, P., Kasevich, M., Inan, U., Kenny, T., Spilker Jr, J., Parkinson, B., … & Langenstein, T. Stanford Center for Position, Navigation & Time.

 

  • Lyons, W. A., Reising, S. C., Inan, U. S., & Bell, T. F. (1996). Evidence for continuing current in sprite-producing cloud-to-ground lightning.

 

  • Horack, J. M., Inan, U., Reising, S. C., & Fishman, G. J. (1996). On the association of terrestrial gamma-ray bursts with lightning and implications for sprites.

 

  • Alford, J., Engebretson, M., Arnoldy, R., & Inan, U. (1996). Frequency variations of quasi-periodic ELF-VLF emissions: A possible new ground-based diagnostic of the outer high-latitude magnetosphere.JOURNAL OF GEOPHYSICAL RESEARCH-ALL SERIES-101, 83-97.

 

  • Reising, S. C., Inan, U. S., & Bell, T. F. (1999). ELF sferic energy as a proxy indicator for sprite occurrence.Geophysical Research Letters26(7), 987-990.

 

  • Hospodarsky, G., Averkamp, T., Kurth, W., Gurnett, D., Dougherty, M., Inan, U., & Wood, T. (2001). Wave normal and Poynting vector calculations using the Cassini radio and plasma wave instrument.Journal of Geophysical Research. A. Space Physics106, 30.

 

  • Salihoglu, B., Fraser, W.R., and Hofmann, E.E. (2001) Factors affecting fledging weight of Adélie penguin (Pygoscelis adeliae) chicks: a modelling study. Polar Biology, 24:328-337.

 

  • Hüsrevoğlu, Y.S. and E.E. Hofmann, 2001. Circumpolar Modeling study of Habitat Control on Antarctic Krill (Euphausia superba) Spawning. 2001 Gordon Research Conference on Polar Marine Science, Ventura, CA, USA, March 11-16, 2001.

 

  • Clilverd, M. A., Nunn, D., Lev‐Tov, S. J., Inan, U. S., Dowden, R. L., Rodger, C. J., & Smith, A. J. (2002). Determining the size of lightning‐induced electron precipitation patches.Journal of Geophysical Research: Space Physics,107(A8).

 

  • Wood, T. G., & Inan, U. S. (2002). Long‐range tracking of thunderstorms using sferic measurements.Journal of Geophysical Research: Atmospheres,107(D21).

 

  • Moore, R. C., Barrington‐Leigh, C. P., Inan, U. S., & Bell, T. F. (2003). Early/fast VLF events produced by electron density changes associated with sprite halos.Journal of Geophysical Research: Space Physics108(A10).

 

  • Peter, W. B., Chevalier, M., & Inan, U. S. (2003, October). Subionospheric VLF measurements of the effects of geomagnetic storms on the mid-latitude D-region. In11th International Ionosphere Effects Symposium A (Vol. 70, pp. 3-5).

 

  • Wood, T. G., & Inan, U. S. (2004). Localization of individual lightning discharges via directional and temporal triangulation of sferic measurements at two distant sites.Journal of Geophysical Research: Atmospheres109(D21).

 

  • Klinck, J.M., Hofmann, E.E., Beardsley, R.C., Salihoglu, B. and Howard, S (2004) Water mass properties and circulation on the west Antarctic Peninsula Continental Shelf in austral fall and winter 2001. Deep-Sea Research II, 51:1925-1946.

 

  • Hüsrevoğlu, Y.S. and J.M. Klinck, 2004. The Influence of Sea Ice Processes in Control-ling the Water Column Structure in the Ross Sea. EOS Transactions AGU, 84(52), Ocean Sciences Meeting Supplement, Abstract OS32C-19.

 

  • Horne, R. B., Thorne, R. M., Shprits, Y. Y., Meredith, N. P., Glauert, S. A., Smith, A. J., … & Spasojevic, M., Inan, U. S (2005). Wave acceleration of electrons in the Van Allen radiation belts.Nature437(7056), 227-230.

 

  • Spasojevic, M., & Inan, U. S. (2005). Ground based VLF observations near L= 2.5 during the Halloween 2003 storm.Geophysical research letters32(21).

 

  • Platino, M., Inan, U. S., Bell, T. F., Gurnett, D. A., Pickett, J. S., Canu, P., & Décréau, P. M. E. (2005). Whistlers observed by the Cluster spacecraft outside the plasmasphere.Journal of Geophysical Research: Space Physics110(A3).

 

  • Inan, U. (2005). Gamma rays made on Earth.Science307(5712), 1054-1055.

 

  • Inan, U. S., & Lehtinen, N. G. (2005). Production of terrestrial gamma‐ray flashes by an electromagnetic pulse from a lightning return stroke.Geophysical research letters32(19).

 

  • Peter, W. B., & Inan, U. S. (2005). Electron precipitation events driven by lightning in hurricanes.Journal of Geophysical Research: Space Physics,110(A5).

 

  • Marshall, R. A., Inan, U. S., Neubert, T., Hughes, A., Satori, G., Bor, J., … & Allin, T. H. (2005, September). Optical observations geomagnetically conjugate to sprite-producing lightning discharges. InAnnales Geophysicae (Vol. 23, No. 6, pp. 2231-2237).

 

  • Inan, U. S., Cohen, M. B., Said, R. K., Smith, D. M., & Lopez, L. I. (2006). Terrestrial gamma ray flashes and lightning discharges.Geophysical research letters33(18).

 

  • Klinck, J.M., M.S. Dinniman, S. Hüsrevoğlu, E.E. Hofmann and W.O. Smith, Jr, 2006. A regional numerical model of the Ross Sea, Antarctica: circulation, nutrients, and ice. AnSlope and CLIMA Workshop, LDGO, Palisades, NY, USA, June 13-15, 2006.

 

  • Chevalier, T. W., Inan, U. S., & Bell, T. F. (2006). Characterization of terminal impedance and radiation properties of a horizontal VLF antenna over Antarctic ice.Radio science41(6).

 

  • Hüsrevoğlu, Y.S. and J.M. Klinck, 2006. A Modeling Study of the Seasonal Changes of Sea Ice in the Ross Sea, Antarctica. EOS Transactions AGU, 87(36), Ocean Sciences Meeting Supplement, Abstract OS25Q-04.

 

  • Peter, W. B., Chevalier, M. W., & Inan, U. S. (2006). Perturbations of midlatitude subionospheric VLF signals associated with lower ionospheric disturbances during major geomagnetic storms.Journal of Geophysical Research: Space Physics111(A3).

 

  • Hood, R., Laws, E, and Moore, K, Armstrong, R, Bates, N, Carlson, C, Chai, F, Doney, S, Falkowski, P, Feely, D, Friedrichs, M, Landry, M, Ricardo, L, Nelson, D, Richardson, T, Salihoglu, B, and Wiggert, J. (2006) Functional group modelling: progress challenges and prospects. Deep-Sea Research II, 53, 459-512

 

  • Salihoglu, B., and Hofmann, E.E. (2007a) Simulations of phytoplankton species and carbon production in the equatorial Pacific Ocean 1. Model configuration and ecosystem dynamics. Journal of Marine Research, 65, 219-273

 

  • Salihoglu, B. and Hofmann, E.E. (2007b) Simulations of phytoplankton species and carbon production in the equatorial Pacific Ocean 2. Effects of physical and biogeochemical processes. Journal of Marine Research, 65, 275-300

 

  • Inan, U. S., Lehtinen, N. G., Moore, R. C., Hurley, K., Boggs, S., Smith, D. M., & Fishman, G. J. (2007). Massive disturbance of the daytime lower ionosphere by the giant γ‐ray flare from magnetar SGR 1806–20.Geophysical research letters34(8).

 

  • Inan, U. S., Golkowski, M., Casey, M. K., Moore, R. C., Peter, W., Kulkarni, P., … & Smit, P. (2007). Subionospheric VLF observations of transmitter‐induced precipitation of inner radiation belt electrons.Geophysical research letters34(2).

 

  • Marshall, R. A., & Inan, U. S. (2007). Possible direct cloud‐to‐ionosphere current evidenced by sprite‐initiated secondary TLEs.Geophysical research letters34(5).

 

  • Marshall, R. A., Inan, U. S., & Lyons, W. A. (2007). Very low frequency sferic bursts, sprites, and their association with lightning activity.Journal of Geophysical Research: Atmospheres112(D22).

 

  • Chevalier, M. W., Peter, W. B., Inan, U. S., Bell, T. F., & Spasojevic, M. (2007). Remote sensing of ionospheric disturbances associated with energetic particle precipitation using the South Pole VLF beacon.Journal of Geophysical Research: Space Physics112(A11).

 

  • Klinck, J.M., S. Hüsrevoğlu and M.S. Dinniman, 2007.  The Influence of Sea-Ice and the Ross Ice Shelf on Water Properties. 14th Annual WAIS/FRISP Workshop, Sterling, VA, USA, September 5-8, 2007.

 

  • Kamel, M., S. Hüsrevoğlu, M.S. Dinniman and J.M. Klinck, 2007. Small-ScaleWinds, Polynyas, and Ocean Properties in the Ross Sea, Second Antarctic Meteorological Observation, Modeling, and Forecasting Workshop, Rome, Italy, June 26-28, 2007.

 

  • Gołkowski, M., Inan, U. S., Gibby, A. R., & Cohen, M. B. (2008). Magnetospheric amplification and emission triggering by ELF/VLF waves injected by the 3.6 MW HAARP ionospheric heater.Journal of Geophysical Research: Space Physics113(A10).

 

  • Salihoglu, B., Garçon, V., Oschlies, A., and M. W. Lomas, (2008) Influence of nutrient utilization and remineralization stoichiometry on phytoplankton distribution and carbon export: a modelling study at BATS. Deep Sea-Research I, 55, 73-107

 

  • Klinck, J.M., S. Hüsrevoğlu and M.S. Dinniman, 2008. A model study of the influences of sea-ice and the Ross Ice Shelf on water properties. Third SCAR/IASC IPY Open Science Conference, St.Petersburg, Russia, July 8-11, 2008.

 

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  • Inan, U. (2008).Optical and VLF Imaging of Lightning-Ionosphere Interactions. STANFORD UNIV CA STAR LAB.

 

  • Klinck, J.M., S. Hüsrevoğlu and M.S. Dinniman, 2008. Continental shelf water mass distribution, transformation and off-shelf transport in a sea ice-ocean model of the Ross Sea, Antarctica. AGU Ocean Sciences Meeting, Orlando, FL, USA, March 2-7, 2008.

 

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  • Ozsoy-Cicek, B., S. Kern, S.F Ackley, H Xie, A. E. Tekeli, (2011). Intercomparisons of Antarctic sea properties from ship observations, active and passive microwave satellite observations in the Bellingshausen Sea, Deep-Sea Research II (2011), doi:10.1016/j.dsr2.2010.10.031, volume: 58, number: 9-10, pages: 1092-1111.

 

  • Kern, S., Ozsoy-Cicek, S. Willmess, M. Nicolaus, S.F Ackley, C. Haas, (2011). An intercomparison between AMSR-E snow depth and satellite C- and Ku-Band radar backscatter data for Antarctic sea ice, International Glaciological Society (IGS) – Annals of Glaciology, volume: 52, number: 57, 2011, pg: 279-290.

 

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  • Sakurai, T., Ohno, H., Genceli, F. E., Horikawa, S., Iizuka, Y., Uchida, T., & Hondoh, T. (2010). Magnesium methanesulfonate salt found in the Dome Fuji (Antarctica) ice core.Journal of Glaciology, 56(199), 837-842.

 

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1980’den Günümüze Türkiye ve Kutup Bölgeleri