XXII ISPRS Congress 2012: Technical Commission VIII

Shortis, M.; Shimoda, H.; Cho, K.

Bibliographic data

Multivolume work

Persistent identifier:: 1663813779

Title:: XXII ISPRS Congress 2012

Sub title:: Melbourne, Australia, 25 August-1 September 2012

Year of publication:: 2013

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663813779

Language:: English

Additional Notes:: Kongress-Thema: Imaging a sustainable future

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1663822514

Title:: Technical Commission VIII

Scope:: 590 Seiten

Year of publication:: 2014

Place of publication:: Red Hook, NY

Publisher of the original:: Curran Associates, Inc.

Identifier (digital):: 1663822514

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(39,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist ermittelt.; Literaturangaben

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Shortis, M.; Shimoda, H.; Cho, K.

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 22., 2012, Melbourne; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: [VIII/10: Cryosphere]

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: A STUDY ON EXTRACTING THIN SEA ICE AREA FROM SPACE Kohei Cho, Yusuke Mochizuki, Yuuta Yoshida, Haruhisa Shimoda and Chi-Farn CHEN

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XXXIX-B8, 2012 XXII ISPRS Congress, 25 August — 01 September 2012, Melbourne, Australia A STUDY ON EXTRACTING THIN SEA ICE AREA FROM SPACE *Kohei Cho* , Yusuke Mochizuki*, Yuuta Yoshida? , Haruhisa Shimoda and Chi-Farn CHEN? * Tokai University, 2-28-4 Tomigaya. Shibuya -ku, Tokyo 151-0063 Japan Tel: (81)-3-3481-0611, E-mail: cho@yoyogi.ycc.u-tokai.ac.jp ®Center for Space and Remote Sensing Research (CSRSR) National Central University, E-mail: cfchen@csrsr.ncu.edu.tw Commission VIII, WG VIII/10 KEY WORDS: Sea of Okhotsk, MODIS, FORMOSAT-2, AMSR-E, optical sensor, passive microwave sensor ABSTRACT: Global warming is one of the most serious problems the earth is facing in the 21* Century. In order to detect the sign of global warming, the importance of sea ice monitoring is increasing. Especially, sea ice thickness is an key parameter for understanding the heat flux of sea ice area. However, estimation of sea ice thickness with satellite remote sensing is not easy. In this study authors have examined the possibility of extracting thin sea ice area from remotely sensed data from space. The study was performed in the Sea of Okhotsk. Firstly, the possibility of estimating thin ice thickness with high resolution optical sensor RSI(IFOV=8m) on FORMOSAT- 2 satellite was examined. The comparison of RSI data with in situ measurement of ice thickness suggested the possibility of estimating sea ice thickness with RSI data for less than 20 cm under the cloudless and snow free condition. The correlation between RSI data and MODIS data(IFOV=250m) was also examined for the thin ice area. The result also suggested the possibility of extracting thin sea ice area from MODIS data. Based on these results, the authors have examined possibility of extracting thin sea ice area with passive microwave sensor AMSR-E by using thin ice area estimated with MODIS data as truth data. Since the horizontal polarization of 19GHz are more sensitive to water than the vertical polarization of 19GHz, the authors have utilized the polarization difference of 19GHz for extracting thin sea ice area from AMSR-E data. The detailed study result will be presented in this paper. 1. INTRODUCTION Sea ice has an important role of reflecting the solar radiation back into space. However, the reduction of ice cover due to the global warming decreases the earth albedo, and increases the amount of solar energy absorption leading to more global warming. This means that the trend of global warming is likely to be enhanced in sea ice area. Sea ice also has a role of preventing heat exchange between sea and air. Especially, since the heat flux of thin ice is strongly affected by the ice thickness difference (Maykut, 1978), ice thickness estimation and thin ice area extraction ice are quite important. Under the cloud free condition, high resolution optical sensors are quite useful for monitoring the detailed condition of sea ice. Various studies on estimating ice thickness with optical sensor AVHRR onboard NOAA satellites have been performed in the past (some examples are Allison, 1993, Perovich et al., 1982, and Grenfell, 1983). Basically, the albedo increases as the ice thickness increases. However, detailed comparison of thin ice thickness with high resolution satellite data were not much done in the past. In this study, firstly, authors have evaluated the possibility of estimating thin sea ice thickness with high resolution optical sensor RSI data observed from satellite FORMOSAT-2. Then, the RSI data were compared with moderate resolution optical sensor MODIS data acquired from Aqua satellite to evaluate the possibility of extracting thin sea ice area from MODIS images. Finally, the method for extracting thin ice area from passive microwave sensor AMSR- E data acquired from Aqua satellite was proposed and the result was evaluated using simultaneously collected MODIS data. 2. TEST SITE In this study, the Sea of Okhotsk was selected as the test site for the detailed evaluation of thin ice area extraction from remotely sensed data from space. Figure 1 show the maps of the test site. The Sea of Okhotsk is located in the north side of Japan, and is one of the most southern seasonal sea ice zones in the northern hemisphere. Since many thin ice area can be found in the Sea of Okhotsk, the sea is suitable for this study. The in situ measurements of ice thickness were performed at the Monbetsu Bay and Saroma Lake along the coast of Hokkaido, Japan. m x i M d © RM lut Tegre \ / (b) Monbetsu bay Saroma Lake Sea of Okhotsk I ES i210 Googie 160m 7 ©2010 RIN T : SS S m Vl 4 | (a) Sea of Okhotsk (c) Saroma Lake Figure 1. Location of test sites

Access restriction

Copyright

fullscreen: Technical Commission VIII (B8)

Multivolume work

Volume

Chapter

Chapter

Table of contents

Cite and reuse

Volume

Chapter

Image

Image fragment

Citation links

Citation recommendation