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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences >
Peer-reviewed Journal Articles, etc >
Helicopter-borne observations with portable microwave radiometer in the Southern Ocean and the Sea of Okhotsk
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| Title: | Helicopter-borne observations with portable microwave radiometer in the Southern Ocean and the Sea of Okhotsk |
| Authors: | Tamura, Takeshi Browse this author →KAKEN DB | | Ohshima, Kay I. Browse this author →KAKEN DB | | Lieser, Jan L. Browse this author | | Toyota, Takenobu Browse this author →KAKEN DB | | Tateyama, Kazutaka Browse this author | | Nomura, Daiki Browse this author →KAKEN DB | | Nakata, Kazuki Browse this author | | Fraser, Alexander D. Browse this author | | Jansen, Peter W. Browse this author | | Newbery, Kym B. Browse this author | | Massom, Robert A. Browse this author | | Ushio, Shuki Browse this author →KAKEN DB |
| Keywords: | remote sensing | | sea ice |
| Issue Date: | 2015 |
| Publisher: | Cambridge University Press |
| Journal Title: | Annals of Glaciology |
| Volume: | 56 |
| Issue: | 69 |
| Start Page: | 436 |
| End Page: | 444 |
| Publisher DOI: | 10.3189/2015AoG69A621 |
| Abstract: | Accurately measuring and monitoring the thickness distribution of thin ice is crucial for accurate estimation of ocean–atmosphere heat fluxes and rates of ice production and salt flux in ice-affected oceans. Here we present results from helicopter-borne brightness temperature (TB) measurements in the Southern Ocean in October 2012 and in the Sea of Okhotsk in February 2009 carried out with a portable passive microwave (PMW) radiometer operating at a frequency of 36 GHz. The goal of these measurements is to aid evaluation of a satellite thin-ice thickness algorithm which uses data from the spaceborne Advanced Microwave Scanning Radiometer–Earth Observing System AMSR-E) or the Advanced Microwave Scanning Radiometer-II (AMSR-II). AMSR-E and AMSR-II TB agree with the spatially collocated mean TB from the helicopter-borne measurements within the radiometers’ precision. In the Sea of Okhotsk in February 2009, the AMSR-E 36GHz TB values are closer to the mean than the modal TB values measured by the helicopter-borne radiometer. In an Antarctic coastal polynya in October 2012, the polarization ratio of 36GHz vertical and horizontal TB is estimated to be 0.137 on average. Our measurements of the TB at 36 GHz over an iceberg tongue suggest a way to discriminate it from sea ice by its unique PMW signature. |
| Rights: | © 2015 The Authors | | http://creativecommons.org/licenses/by/4.0/ |
| Relation: | https://www.igsoc.org/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/70591 |
| Appears in Collections: | 水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 野村 大樹
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