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Recent Trends of Summer Convective and Stratiform Precipitation in Mid-Eastern China

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ABSTRACT

Many studies have reported on the trends of precipitation in Mid-Eastern China (EC). However, the trends of convective and stratiform precipitation are still unknown. Here, we examine the trends of summer convective and stratiform precipitation in EC from 2002 to 2012 on the basis of the TRMM observations. Results revealed that the rain frequency (RF) for both convective and stratiform precipitation increased in majority regions of Southern EC (SEC), but decreased in Northwest part of Northern EC (NEC). The decreasing rate of RF for stratiform precipitation in NEC is twice as much as that for convective precipitation, while the increase of convective precipitation in SEC is more evident than stratiform precipitation. The rain rate (RR) exhibited a decreasing trend in most portions of EC for both convective and stratiform precipitation. In SEC, neither PW nor WVT has good ability in explaining the precipitation variability. However, in NEC, PW is closely correlated to convective RF and WVT is more closely related to stratiform RF.

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Spatial patterns of the summer mean rain rate (a,b) and rain frequency (c,d) for convective (left panel) and stratiform (right panel) precipitation at 1° × 1° resolution in EC during 2002–2012. Black dots in Figure 1a denote the locations of IGRA stations (see Methods). Maps were generated in NCAR Command Language (NCL)42.
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f1: Spatial patterns of the summer mean rain rate (a,b) and rain frequency (c,d) for convective (left panel) and stratiform (right panel) precipitation at 1° × 1° resolution in EC during 2002–2012. Black dots in Figure 1a denote the locations of IGRA stations (see Methods). Maps were generated in NCAR Command Language (NCL)42.

Mentions: Figure 1 displays the summer mean RR and RF of convective and stratiform precipitation at 1° × 1° resolution during 2002–2012. The summer mean RR for convective precipitation ranges from 9 mm/h to 14 mm/h, which is much larger than that for stratiform precipitation (1.8 mm/h~ 2.6 mm/h). And the mean RR in Northern EC (NEC, 30–35°N, 113–122°E) is generally larger than in Southern EC (SEC, 26–30°N,113–122°E) for both convective and stratiform precipitation. However, the summer stratiform RF varies from 3.2% to 5%, almost 3 times larger than that of convective precipitation (0.56%~1.4%), which is consistent with previous research23. Besides, regions of high convective and stratiform RF values locate along the Yangtze River, as well as part of SEC, which is probably associated with Asian summer monsoon10.


Recent Trends of Summer Convective and Stratiform Precipitation in Mid-Eastern China
Spatial patterns of the summer mean rain rate (a,b) and rain frequency (c,d) for convective (left panel) and stratiform (right panel) precipitation at 1° × 1° resolution in EC during 2002–2012. Black dots in Figure 1a denote the locations of IGRA stations (see Methods). Maps were generated in NCAR Command Language (NCL)42.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5015104&req=5

f1: Spatial patterns of the summer mean rain rate (a,b) and rain frequency (c,d) for convective (left panel) and stratiform (right panel) precipitation at 1° × 1° resolution in EC during 2002–2012. Black dots in Figure 1a denote the locations of IGRA stations (see Methods). Maps were generated in NCAR Command Language (NCL)42.
Mentions: Figure 1 displays the summer mean RR and RF of convective and stratiform precipitation at 1° × 1° resolution during 2002–2012. The summer mean RR for convective precipitation ranges from 9 mm/h to 14 mm/h, which is much larger than that for stratiform precipitation (1.8 mm/h~ 2.6 mm/h). And the mean RR in Northern EC (NEC, 30–35°N, 113–122°E) is generally larger than in Southern EC (SEC, 26–30°N,113–122°E) for both convective and stratiform precipitation. However, the summer stratiform RF varies from 3.2% to 5%, almost 3 times larger than that of convective precipitation (0.56%~1.4%), which is consistent with previous research23. Besides, regions of high convective and stratiform RF values locate along the Yangtze River, as well as part of SEC, which is probably associated with Asian summer monsoon10.

View Article: PubMed Central - PubMed

ABSTRACT

Many studies have reported on the trends of precipitation in Mid-Eastern China (EC). However, the trends of convective and stratiform precipitation are still unknown. Here, we examine the trends of summer convective and stratiform precipitation in EC from 2002 to 2012 on the basis of the TRMM observations. Results revealed that the rain frequency (RF) for both convective and stratiform precipitation increased in majority regions of Southern EC (SEC), but decreased in Northwest part of Northern EC (NEC). The decreasing rate of RF for stratiform precipitation in NEC is twice as much as that for convective precipitation, while the increase of convective precipitation in SEC is more evident than stratiform precipitation. The rain rate (RR) exhibited a decreasing trend in most portions of EC for both convective and stratiform precipitation. In SEC, neither PW nor WVT has good ability in explaining the precipitation variability. However, in NEC, PW is closely correlated to convective RF and WVT is more closely related to stratiform RF.

No MeSH data available.


Related in: MedlinePlus