The Impact of Sensible Heat Flux Anormaly over Central Asia on Temperature and Precipitation in Northwest China
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The time-lag and the spatial coupling relationships between the sensible heat flux in Central Asia taken from t he NCEP/ NCAR 1954 —2004 reanalysis monthly data and the Chinese monthly mean surface air temperature and monthly precipitation data at 31 stations in Northwest China (NWC) are diagnosed using of the SVD technique. The results are as follows : (1) There exists the obvious negative correlation between sensible heat of Central Asia from April to September and surface temperature in following January of NWC. (2) Correlation between sensible heat from May to July of Central Asia and surfaces temperature in following January in mostly of NWC. (3) There are the clear correlation between sensible heat of Cent ral Asia from May to June , July to September and October to December and precipitation in July , October and January of next year′s of NWC. (4) Negative correlation between sensible heat of Cent ral Asia from May to June and precipitation of south of Gansu and north and southeast of Xinjiang in July.
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The first SVD mode homo-correlation coefficients of sensible heat and hete-correlation coefficients of temperature of the anomalies of the pervious year′s sensible heat of Central Asia and the anomalies of the year′s temperature of Northwest China (NWC) .
“○”represents the homo-correlation coefficients of the sensible heat of central Asia “ ●”represents the hete-correlation coefficients of
temperature in NWC
(Picture/Plateau Meteorology) |
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The first SVD mode correlation coefficient pattern and time coefficient of the sensible heat (a) of Central Asia from May to July and hete-correlation coefficients of surface temperature (b) of NWC in following J anuary and time coefficient (c) . “○”represents the time coefficients of the sensible heat of Central Asia “ ●”represents the time coefficients of surface temperature of the NWC
(Picture/Plateau Meteorology) |
