EVALUATION OF THE APPLICABILITY OF MSU/AMSU DATA TO THE MONITORING OF TEMPERATURE CLIMATE CHANGES IN THE UPPER AIR OVER THE TROPICAL OCEAN
BAI Ying
ZHANG Zu-qiang
SHAO Xie
Abstract：Based on MSU/AMSU microwave brightness temperature data derived from STAR V3.0,together with three kinds of reanalysis data sets,the temperature changes in the upper air over the tropical ocean are analyzed through examination of different heights,regions and seasons to evaluate the reliability of the application of MSU/AMSU data.Results are shown as follows:(1) The MSU/AMSU data is reliable in the tropical region,particularly in the domain of 30 ° E～70 °W,15 ° S～15 °N;(2) The wanning of the troposphere over the tropical ocean began in the late 1980 s and early 1990 s with a rate of 0.045 K/(10 a) and 0.107 K/(10 a) in the upper and middle troposphere respectively,while the cooling of the lower stratosphere started in the mid-1990s with a rate of-0.345 K/(10 a);(3) The spatial feature of the temperature changes in the upper air is quite robust over the tropical ocean,especially over the Indian Ocean and the western Pacific,and the seasonal temperature change in the lower stratosphere is more stable than in the troposphere,and the warming trend in the autumn and winter is more significant than in the spring and summer;(4) Compared with the NCEP/DOE,the MSU/AMSU data describes the atmospheric response to the tropical SST forcing better in the middle east Pacific,comparable in the Indian Ocean and worse in western Pacific,which suggested that MSU/AMSU data can be used to monitor the climate change over the tropical oceans.
Keywords：MSU/AMSUtropical oceanupper airlong term change trendsapplicabilitydata comparison
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 221-230 )