| 连续台风时期香港区域的水汽变化分析 |
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| 引用本文： | 周苏娅,闻德保,梅登奎.连续台风时期香港区域的水汽变化分析[J].大地测量与地球动力学,2020,40(1):82-86. |
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| 作者姓名： | 周苏娅 闻德保 梅登奎 |
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| 作者单位： | 长沙理工大学交通运输工程学院;广州大学地理科学学院 |
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| 基金项目： | 国家自然科学基金(41674040)~~ |
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| 摘 要： | 利用香港卫星定位参考站网GNSS观测数据,提取强热带风暴“塔拉斯”与热带风暴“洛克”影响期间各测站天顶方向对流层延迟,反演香港区域大气可降水量;根据香港区域49个天文台气象站提供的实测降雨量数据,分析大气可降水量与实际降雨量的相关性,以及两次台风对香港区域水汽时空分布的不同影响。结果表明,大气可降水量在台风影响前期均上升,在大量降雨后回落,但在连续台风的间歇期间,仍高于台风来临前的水平;水汽累积是大量降雨的前提条件,当水汽累积量相近时,水汽累积时长与累积降雨量呈正相关;台风期间大气可降水量值超过65 mm的区域面积与台风等级相关,台风路径对局部水汽分布有一定的影响。
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| 关 键 词： | 大气可降水量 对流层延迟 台风 GNSS 时空规律 |
Analysis of Water Vapor Variation over Hong Kong Region during Successive Typhoons |
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| ZHOU Suya,WEN Debao,MEI Dengkui.Analysis of Water Vapor Variation over Hong Kong Region during Successive Typhoons[J].Journal of Geodesy and Geodynamics,2020,40(1):82-86. |
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| Authors: | ZHOU Suya WEN Debao MEI Dengkui |
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| Institution: | (School of Traffic and Transportation Engineering,Changsha University of Science and Technology,960 Second Segment of South-Wanjiali Road,Changsha 410114,China;School of Geographical Sciences,Guangzhou University,230 West-Waihuan Road,Guangzhou University Town,Guangzhou 510006,China) |
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| Abstract: | Zenith troposphere delay (ZTD) of GNSS ground observation stations is extracted by processing GNSS observation data during the period of severe tropical storm ‘Talas’ and tropical storm ‘Roke’. Precipitable water vapor (PWV) is inverted with ZTD. Based on the rainfall data provided by 49 meteorological stations of Hong Kong observatory, the correlation between PWV and actual rainfall is comparatively analyzed, the effects of the two typhoons on space-time distribution of water vapor in Hong Kong are also studied. The results show that PWV rises in the early stage of typhoon period and falls back after heavy rainfall; especially, PWV in the interval of successive typhoons is still higher than the level before typhoon; water vapor accumulation is the precondition of heavy rainfall, and there is a positive correlation between the cumulative time of the water vapor accumulation and the cumulative rainfall when water vapor accumulations are similar. The area with a PWV value greater than 65 mm is correlated to the typhoon grade, and typhoon path has certain influence on local water vapor distribution. |
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| Keywords: | precipitable water vapor(PWV) zenith troposphere delay(ZTD) typhoon GNSS time-space regulations |
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