Abstract
This study investigates changes in temporal trends and spatial patterns of precipitation in Beijing over the last six decades. These changes are discussed in the context of rapid urbanization and the growing imbalance between water supply and demand in Beijing. We observed significant decreases in precipitation amounts from 1950 to 2012, with the annual precipitation decreasing by 32% at a decadal rate of 28.5 mm. In particular, precipitation decrease is more pronounced in the summer and warm seasons when water use is at its seasonal peak. We further analyzed hourly precipitation data from 43 rain gauges between 1980 and 2012 to examine the spatiotemporal characteristics of both precipitation amount and intensity across six distinct subregions in Beijing. No significant spatial variations in precipitation changes were identified, but slightly greater amounts of precipitation were noted in the urban areas (plains) than in the surrounding suburbs (mountains), due to the effect of urbanization and topography. Precipitation intensity has increased substantially, especially at the hourly duration, as evidenced by the more frequent occurrence of extreme storms. The observed decreased water availability and the increase in extreme weather events require more integrated water management, particularly given the expectation of a warmer and more variable climate, the continued rapid growth of the Beijing metropolis, and the intensifying conflict between water supply and demand.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 11250-11271 |
| Number of pages | 22 |
| Journal | Journal of Geophysical Research C: Oceans |
| Volume | 119 |
| Issue number | 19 |
| DOIs | |
| State | Published - 2014 |
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Keywords
- Beijing
- precipitation intensity
- precipitation pattern
- spatiotemporal variation
- trend
ASJC Scopus subject areas
- Atmospheric Science
- Geophysics
- Earth and Planetary Sciences (miscellaneous)
- Space and Planetary Science
Cite this
Rapid urbanization and changes in spatiotemporal characteristics of precipitation in Beijing metropolitan area. / Song, Xiaomeng; Zhang, Jianyun; Aghakouchak, Amir; Roy, Shouraseni S; Xuan, Yunqing; Wang, Guoqing; He, Ruimin; Wang, Xiaojun; Liu, Cuishan.
In: Journal of Geophysical Research C: Oceans, Vol. 119, No. 19, 2014, p. 11250-11271.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Rapid urbanization and changes in spatiotemporal characteristics of precipitation in Beijing metropolitan area
AU - Song, Xiaomeng
AU - Zhang, Jianyun
AU - Aghakouchak, Amir
AU - Roy, Shouraseni S
AU - Xuan, Yunqing
AU - Wang, Guoqing
AU - He, Ruimin
AU - Wang, Xiaojun
AU - Liu, Cuishan
PY - 2014
Y1 - 2014
N2 - This study investigates changes in temporal trends and spatial patterns of precipitation in Beijing over the last six decades. These changes are discussed in the context of rapid urbanization and the growing imbalance between water supply and demand in Beijing. We observed significant decreases in precipitation amounts from 1950 to 2012, with the annual precipitation decreasing by 32% at a decadal rate of 28.5 mm. In particular, precipitation decrease is more pronounced in the summer and warm seasons when water use is at its seasonal peak. We further analyzed hourly precipitation data from 43 rain gauges between 1980 and 2012 to examine the spatiotemporal characteristics of both precipitation amount and intensity across six distinct subregions in Beijing. No significant spatial variations in precipitation changes were identified, but slightly greater amounts of precipitation were noted in the urban areas (plains) than in the surrounding suburbs (mountains), due to the effect of urbanization and topography. Precipitation intensity has increased substantially, especially at the hourly duration, as evidenced by the more frequent occurrence of extreme storms. The observed decreased water availability and the increase in extreme weather events require more integrated water management, particularly given the expectation of a warmer and more variable climate, the continued rapid growth of the Beijing metropolis, and the intensifying conflict between water supply and demand.
AB - This study investigates changes in temporal trends and spatial patterns of precipitation in Beijing over the last six decades. These changes are discussed in the context of rapid urbanization and the growing imbalance between water supply and demand in Beijing. We observed significant decreases in precipitation amounts from 1950 to 2012, with the annual precipitation decreasing by 32% at a decadal rate of 28.5 mm. In particular, precipitation decrease is more pronounced in the summer and warm seasons when water use is at its seasonal peak. We further analyzed hourly precipitation data from 43 rain gauges between 1980 and 2012 to examine the spatiotemporal characteristics of both precipitation amount and intensity across six distinct subregions in Beijing. No significant spatial variations in precipitation changes were identified, but slightly greater amounts of precipitation were noted in the urban areas (plains) than in the surrounding suburbs (mountains), due to the effect of urbanization and topography. Precipitation intensity has increased substantially, especially at the hourly duration, as evidenced by the more frequent occurrence of extreme storms. The observed decreased water availability and the increase in extreme weather events require more integrated water management, particularly given the expectation of a warmer and more variable climate, the continued rapid growth of the Beijing metropolis, and the intensifying conflict between water supply and demand.
KW - Beijing
KW - precipitation intensity
KW - precipitation pattern
KW - spatiotemporal variation
KW - trend
UR - http://www.scopus.com/inward/record.url?scp=84929595921&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84929595921&partnerID=8YFLogxK
U2 - 10.1002/2014JD022084
DO - 10.1002/2014JD022084
M3 - Article
VL - 119
SP - 11250
EP - 11271
JO - Journal of Geophysical Research: Oceans
JF - Journal of Geophysical Research: Oceans
SN - 2169-9275
IS - 19
ER -