Increasing Water Vapor in the Stratosphere and Mesosphere After 2002
Increasing Water Vapor in the Stratosphere and Mesosphere After 2002
复制标题
DOI：
10.1029/2019gl084973
复制
发表时间：
2019-11
影响因子：
5.2
通讯作者：
J. Yue;J. Russell;Q. Gan;Tao Wang;P. Rong;R. Garcia;M. Mlynczak
中科院分区：
文献类型：
--
作者：
J. Yue;J. Russell;Q. Gan;Tao Wang;P. Rong;R. Garcia;M. Mlynczak
分析了2002年至2018年期间使用宽带发射辐射测量（SABER）仪器探测大气和2004年至2018年期间使用Aura微波临边探测器（MLS）仪器测量的水汽（H2O），以确定平流层和中间层中H2O的线性趋势和太阳周期响应。SABER和MLS都显示，在2001年下降之后，平流层下部的全球H2O每十年快速增加5-6%。SABER和MLS中40°N纬向平均H2O的增加与Boulder霜点湿度计在平流层下部的资料一致。SABER和MLS H2O趋势的全球分布在大多数高度和纬度都是正的，并且在热带平流层下部达到峰值。在中间层，SABER H2O趋势为每十年0.1-0.2 ppmv，MLS H2O趋势为每十年0.2-0.3 ppmv。的趋势和太阳活动周期的响应来自观测结果进行了比较，对全大气社区气候模式（WACCM）。WACCM观测到的H_2O对太阳活动周期的响应与SABER和MLS观测结果一致。WACCM的线性H2O趋势没有显示出在平流层下部观测到的增加。
Water vapor (H2O) measurements made by the Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) instrument between 2002 and 2018 and by the Aura Microwave Limb Sounder (MLS) instrument between 2004 and 2018 are analyzed to determine the linear trend and solar cycle response of H2O in the stratosphere and mesosphere. Both SABER and MLS show a rapid global H2O increase of 5–6% per decade in the lower stratosphere after the 2001 drop. The increasing zonal mean H2O at 40°N in SABER and MLS is consistent with the Boulder frost point hygrometer data in the lower stratosphere. The global distribution of SABER and MLS H2O trends are positive at most altitudes and latitudes, and they peak in the tropical lower stratosphere. In the mesosphere the SABER H2O trend is 0.1–0.2 ppmv per decade and the MLS H2O trend is 0.2–0.3 ppmv per decade. The trend and solar cycle response derived from the observations are compared against the Whole Atmosphere Community Climate Model (WACCM). The solar cycle response of H2O from WACCM agrees with SABER and MLS. The linear H2O trend from WACCM does not show the observed increase in the lower stratosphere.