| 基于无线电探空和无线电掩星观测的北极上层气温研究 |
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| 引用本文： | 常亮,郭立新,冯贵平,吴雪睿,高郭平,张扬,张瑜.基于无线电探空和无线电掩星观测的北极上层气温研究[J].海洋学报(英文版),2018,37(1):30-39. |
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| 作者姓名： | 常亮 郭立新 冯贵平 吴雪睿 高郭平 张扬 张瑜 |
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| 作者单位： | 上海海洋大学海洋科学学院, 上海, 201306;远洋渔业协同创新中心, 上海, 201306,上海海洋大学海洋科学学院, 上海, 201306;远洋渔业协同创新中心, 上海, 201306,上海海洋大学海洋科学学院, 上海, 201306;远洋渔业协同创新中心, 上海, 201306,中国科学院上海天文台, 上海, 200030;行星科学重点实验室, 上海, 200030,上海海洋大学海洋科学学院, 上海, 201306;远洋渔业协同创新中心, 上海, 201306,国家海洋局第二海洋研究所 卫星海洋环境动力学国家重点实验室, 杭州, 310012,上海海洋大学海洋科学学院, 上海, 201306;远洋渔业协同创新中心, 上海, 201306 |
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| 摘 要： | The air temperature is one of the most important parameters used for monitoring the Arctic climate change. The constellation observing system for meteorology, ionosphere, and climate and Formosa Satellite Mission 3(COSMIC/FORMOSAT-3) radio occultation(RO) "wet" temperature product(i.e., "wet Prf") is used to analyze the Arctic air temperature profiles at 925–200 hPa in 2007–2012. The "wet" temperatures are further compared with radiosonde(RS) observations. The results from the spatially and temporally synchronized RS and COSMIC observations show that their temperatures agree well with each other, especially at 400 hPa. Comparisons of seasonal temperatures and anomalies from the COSMIC and homogenized RS observations suggest that the limited number of COSMIC observations during the spatial matchup may be insufficient to describe the smallscale spatial structure of temperature variations. Furthermore, comparisons of the seasonal temperature anomalies from the RS and 5°×5° gridded COSMIC observations at 400 hPa during the sea ice minimum(SIM) of2007 and 2012 are also made. The results reveal that similar Arctic temperature variation patterns can be obtained from both RS and COSMIC observations over the land area, while extra information can be further provided from the densely distributed COSMIC observations. Therefore, despite COSMIC observations being unsuitable to describe the Arctic temperatures in the lowest level, they provide a complementary data source to study the Arctic upper-air temperature variations and related climate change.
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| 关 键 词： | 北极气温 无线电掩星 无线电探空 |
| 收稿时间： | 2016/11/15 0:00:00 |
Comparison of the Arctic upper-air temperatures from radiosonde and radio occultation observations |
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| CHANG Liang,GUO Lixin,FENG Guiping,WU Xuerui,GAO Guoping,ZHANG Yang and ZHANG Yu.Comparison of the Arctic upper-air temperatures from radiosonde and radio occultation observations[J].Acta Oceanologica Sinica,2018,37(1):30-39. |
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| Authors: | CHANG Liang GUO Lixin FENG Guiping WU Xuerui GAO Guoping ZHANG Yang and ZHANG Yu |
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| Institution: | 1.College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China;Collaborative Innovation Center for Distant-water Fisheries, Shanghai 201306, China2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China;Key Laboratory of Planetary Sciences, Chinese Academy of Sciences, Shanghai 200030, China3.State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China |
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| Abstract: | The air temperature is one of the most important parameters used for monitoring the Arctic climate change. The constellation observing system for meteorology, ionosphere, and climate and Formosa Satellite Mission 3 (COSMIC/FORMOSAT-3) radio occultation (RO) “wet” temperature product (i.e., “wetPrf”) is used to analyze the Arctic air temperature profiles at 925–200 hPa in 2007–2012. The “wet” temperatures are further compared with radiosonde (RS) observations. The results from the spatially and temporally synchronized RS and COSMIC observations show that their temperatures agree well with each other, especially at 400 hPa. Comparisons of seasonal temperatures and anomalies from the COSMIC and homogenized RS observations suggest that the limited number of COSMIC observations during the spatial matchup may be insufficient to describe the smallscale spatial structure of temperature variations. Furthermore, comparisons of the seasonal temperature anomalies from the RS and 5°×5° gridded COSMIC observations at 400 hPa during the sea ice minimum (SIM) of 2007 and 2012 are also made. The results reveal that similar Arctic temperature variation patterns can be obtained from both RS and COSMIC observations over the land area, while extra information can be further provided from the densely distributed COSMIC observations. Therefore, despite COSMIC observations being unsuitable to describe the Arctic temperatures in the lowest level, they provide a complementary data source to study the Arctic upper-air temperature variations and related climate change. |
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| Keywords: | Arctic temperature radio occultation radiosonde |
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