Global tropopause height trends estimated from GPS radio occultation data
Global tropopause height trends estimated from GPS radio occultation data
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DOI：
10.1029/2008gl034012
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发表时间：
2008-06
影响因子：
5.2
通讯作者：
T. Schmidt;J. Wickert;G. Beyerle;S. Heise
中科院分区：
文献类型：
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作者：
T. Schmidt;J. Wickert;G. Beyerle;S. Heise
本文基于2001年5月至2007年12月（80个月）德国CHAMP卫星任务的纬向月平均GPS无线电掩星数据，讨论了全球对流层顶高度的变化和趋势。2006年7月CHAMP数据缺失的数据缺口被美国-德国GRACE任务的无线电掩星数据填补。在观测期内（5°或10°纬度波段），全球对流层顶高度增加在26 ~ 44 m之间（4 ~ 7 m/年）。相应的趋势误差在19 ~ 21 m之间。在回归模式中包含准两年一次的振荡导致全球对流层顶高度在时间段内增加1-5 m(2-12%)，这取决于分组方法。全球对流层顶高度变化与对流层上层（500-100 hPa）正相关，与平流层下层（100-30 hPa）温度变化反相关。
This study discusses global tropopause height variabilities and trends based on zonal monthly mean GPS radio occultation data from the German CHAMP satellite mission for the period May 2001–December 2007 (80 months). A data gap of missing CHAMP data in July 2006 was filled with radio occultation data of the US‐German GRACE mission. A global increase of the tropopause height between 26–44 m during the observation period (4–7 m/yr) is found depending on the binning method (5° or 10° latitude bands) and the used tropopause detection algorithm. The corresponding trend errors vary between 19–21 m. The inclusion of the quasi‐biennial oscillation in the regression model leads to a global increase of the tropopause height from 1–5 m (2–12%) during the time period depending on the binning method. Global tropopause height variations are positively correlated with upper tropospheric (500–100 hPa) and anti‐correlated with lower stratospheric (100–30 hPa) temperature variations.