物理学报
物理學報
물이학보
2013年
3期
537-547
,共11页
第二对流层顶%COSMIC%出现频率%偏差
第二對流層頂%COSMIC%齣現頻率%偏差
제이대류층정%COSMIC%출현빈솔%편차
the second tropopause%COSMIC%occurrence frequency%difference
使用2006年12月—2008年11月 COSMIC (constellation observing system for meteorology, ionosphere and climate)掩星湿廓线资料对第二对流层顶的全球分布特征进行统计,对比三个站点的无线电探空仪和COSMIC的对流层顶资料,研究结果表明:1)第二对流层顶的出现频率在副热带急流区较高,冬季在北半球为50%—70%,在南半球为20%—40%;2)赤道带的第二对流层顶出现频率约为20%—26%,与越赤道急流和对流层顶上的毛卷云有关;3)在副热带急流区,第一对流层顶的温度基本高于第二对流层顶;4)在热带,对流层顶厚度和第二对流层顶出现频率随纬度减小;热带以外,对流层顶厚度随纬度增加,在冬半球60?有最大值7—8 km;5)单站点对流层顶的日变化剧烈程度与COSMIC和探空仪的对流层顶高度偏差正相关.
使用2006年12月—2008年11月 COSMIC (constellation observing system for meteorology, ionosphere and climate)掩星濕廓線資料對第二對流層頂的全毬分佈特徵進行統計,對比三箇站點的無線電探空儀和COSMIC的對流層頂資料,研究結果錶明:1)第二對流層頂的齣現頻率在副熱帶急流區較高,鼕季在北半毬為50%—70%,在南半毬為20%—40%;2)赤道帶的第二對流層頂齣現頻率約為20%—26%,與越赤道急流和對流層頂上的毛捲雲有關;3)在副熱帶急流區,第一對流層頂的溫度基本高于第二對流層頂;4)在熱帶,對流層頂厚度和第二對流層頂齣現頻率隨緯度減小;熱帶以外,對流層頂厚度隨緯度增加,在鼕半毬60?有最大值7—8 km;5)單站點對流層頂的日變化劇烈程度與COSMIC和探空儀的對流層頂高度偏差正相關.
사용2006년12월—2008년11월 COSMIC (constellation observing system for meteorology, ionosphere and climate)엄성습곽선자료대제이대류층정적전구분포특정진행통계,대비삼개참점적무선전탐공의화COSMIC적대류층정자료,연구결과표명:1)제이대류층정적출현빈솔재부열대급류구교고,동계재북반구위50%—70%,재남반구위20%—40%;2)적도대적제이대류층정출현빈솔약위20%—26%,여월적도급류화대류층정상적모권운유관;3)재부열대급류구,제일대류층정적온도기본고우제이대류층정;4)재열대,대류층정후도화제이대류층정출현빈솔수위도감소;열대이외,대류층정후도수위도증가,재동반구60?유최대치7—8 km;5)단참점대류층정적일변화극렬정도여COSMIC화탐공의적대류층정고도편차정상관.
The global distribution of the second lapse-rate tropopause (LRT2) is investigated with the radio occultation measurements from the constellation observing system for meteorology, ionosphere and climate (COSMIC) covering December 2006–November 2008 Comparisons between COSMIC and radiosonde in terms of the tropopause are examined in three stations to check the difference. The research results are as follows. 1) In the winter, occurrence frequency for LRT2 in the northern hemisphere (NH) is of 50%–70%and in the southers hemisphere is of 20%–40%. 2) The second tropopause over the equatorial zone with 20%–26%occurrence seems to be related to the equatorial jet stream and subvisual cirrus above the first tropopause. 3) In the tropic, the difference in altitude and occurrence between the first and second tropopause decrease with latitude. In the extratropic zone, the difference increases with latitude and reaches a maximum of 7–8 km in the winter of the NH. 4) The second tropopause occurs frequently over the subtropical jet stream region, in which the first tropopause temperature is almost higher than the second one. 5) The more intense the single station daily variations of tropopause height, the bigger the difference between COSMIC and radiosonde is.
