Spatial Distribution and Temporal Trends of Monthly Precipitation Concentration in Poyang Lake Basin

2020 ◽  
pp. 57-65
Author(s):  
Liying Xiao ◽  
Guiqing Gao ◽  
Weilin Liu ◽  
Yong Ji
Keyword(s):  
Spatial Distribution ◽  
Poyang Lake ◽  
Temporal Trends ◽  
Lake Basin ◽  
Monthly Precipitation ◽  
Precipitation Concentration ◽  
Poyang Lake Basin

scholarly journals Spatio-temporal Analysis of Precipitation data in the Poyang Lake Basin, China

2020 ◽  
Vol 144 ◽  
pp. 01006
Author(s):  
Liying Xiao
Keyword(s):  
Poyang Lake ◽  
Annual Precipitation ◽  
Lake Basin ◽  
Monthly Precipitation ◽  
Precipitation Data ◽  
Upward Trend ◽  
Mountain Area ◽  
Significant Upward Trend ◽  
The North ◽  
Poyang Lake Basin

The monthly precipitation data from 14 stations were used to research the precipitation variation in Poyang lake basin during 1957–2012. The Mann–Kendall method was applied to analysis precipitation trends. There are two main periods of 1964~1975 and 1986~1999 with increasing annual precipitations for this basin. There is a highest coefficient of variation of the annual precipitation in the north mountain area of the basin. There are significant increasing trends in annual precipitation for Lushan station and Zhangshu station which located in the north. Six stations in the north had the significant upward trend in summer and eleven stations had the significant upward trend in winter. It can be determined that the Poyang lake basin has become wetter in winter over the period 1957-2012.

Meteorological Drought Migration in the Poyang Lake Basin, China: Switching among Different Climate Modes

2020 ◽  
Vol 21 (3) ◽  
pp. 415-431
Author(s):  
Han Zhou ◽  
Wen Zhou ◽  
Yuanbo Liu ◽  
Yanbin Yuan ◽  
Jiejun Huang ◽  
...  
Keyword(s):  
Poyang Lake ◽  
Standardized Precipitation Index ◽  
Meteorological Drought ◽  
Spatiotemporal Variability ◽  
Lake Basin ◽  
Monthly Precipitation ◽  
Spatiotemporal Evolution ◽  
Climate Modes ◽  
Poyang Lake Basin ◽  
Meteorological Droughts

AbstractThe spatiotemporal variability of droughts over a region can often be characterized by combining orthogonal climate modes with corresponding temporal coefficients. The temporal characteristics of climate modes have been extensively addressed, while their spatial development remains largely unexplored. Hence, this study investigated the spatiotemporal evolution of meteorological droughts from the perspective of climate modes. Nearly 50 years of monthly precipitation records (1960–2007) from 73 meteorological stations in the Poyang Lake basin, China, were used. The standardized precipitation index at a 1-month scale was applied to quantify meteorological droughts. The dominant modes of the droughts over the basin were identified using principal component analysis, K-means cluster analysis, and analysis of variance. Based on the trajectory migration identification method, the role of the climate modes in spatiotemporal evolution was analyzed. The results showed that four spatial modes of the droughts in the basin were identified. The spatial extents, centroids, and severity of the drought clusters based on the identified modes were significantly consistent with those based on the meteorological stations (R2 > 0.8, p < 0.05), which indicated that these modes could mostly match the large areas where serious dry/wet conditions occurred. Moreover, their performances in characterizing the spatiotemporal evolutional features (severity, migration distance, and pattern) of drought events were valid, which indicated that they might be considered as the elementary constituents of the historical meteorological drought events across the basin. The findings might offer some implications to understand drought development and causes through possible connections between the dominant modes and climate variability.

Variation in rice water requirement and its influencing factors in Poyang Lake basin during the past 30 years *

2021 ◽  
Author(s):  
Fangping Liu ◽  
Junzeng Xu ◽  
Shihong Yang ◽  
Yongzhong Huang ◽  
Ju Liang
Keyword(s):  
Influencing Factors ◽  
Poyang Lake ◽  
Water Requirement ◽  
Lake Basin ◽  
The Past ◽  
Poyang Lake Basin ◽  
Rice Water

scholarly journals Past and future changes of streamflow in Poyang Lake Basin, Southeastern China

2012 ◽  
Vol 16 (7) ◽  
pp. 2005-2020 ◽  
Author(s):  
S. L. Sun ◽  
H. S. Chen ◽  
W. M. Ju ◽  
J. Song ◽  
J. J. Li ◽  
...  
Keyword(s):  
Poyang Lake ◽  
Water Cycle ◽  
Coupled Model ◽  
Soil Water Storage ◽  
Future Climate Change ◽  
Lake Basin ◽  
Poyang Lake Basin ◽  
The Future ◽  
Intercomparison Project ◽  
Meteorological Observations

Abstract. To understand the causes of the past water cycle variations and the influence of climate variability on the streamflow, lake storage, and flood potential, we analyze the changes in streamflow and the underlying drivers in four typical watersheds (Gaosha, Meigang, Saitang, and Xiashan) within the Poyang Lake Basin, based on the meteorological observations at 79 weather stations, and datasets of streamflow and river level at four hydrological stations for the period of 1961-2000. The contribution of different climate factors to the change in streamflow in each watershed is estimated quantitatively using the water balance equations. Results show that in each watershed, the annual streamflow exhibits an increasing trend from 1961–2000. The increases in streamflow by 4.80 m3 s−1 yr−1 and 1.29 m3 s−1 yr−1 at Meigang and Gaosha, respectively, are statistically significant at the 5% level. The increase in precipitation is the biggest contributor to the streamflow increment in Meigang (3.79 m3 s−1 yr−1), Gaosha (1.12 m3 s−1 yr−1), and Xiashan (1.34 m3 s−1 yr−1), while the decrease in evapotranspiration is the major factor controlling the streamflow increment in Saitang (0.19 m3 s−1 yr−1). In addition, radiation and wind contribute more than actual vapor pressure and mean temperature to the changes in evapotranspiration and streamflow for the four watersheds. For revealing the possible change of streamflow due to the future climate change, we also investigate the projected precipitation and evapotranspiration from of the Coupled Model Intercomparison Project phase 3 (CMIP3) under three greenhouse gases emission scenarios (SRESA1B, SRESA2 and SRESB1) for the period of 2061–2100. When the future changes in the soil water storage changes are assumed ignorable, the streamflow shows an uptrend with the projected increases in both precipitation and evapotranspiration (except for the SRESB1 scenario in Xiashan watershed) relative to the observed mean during 1961–2000. Furthermore, the largest increase in the streamflow is found at Meigang (+4.31%) and Xiashan (+3.84%) under the SRESA1B scenario, while the increases will occur at Saitang (+6.87%) and Gaosha (+5.15%) under the SRESB1 scenario.

Assessment of Carbon Dynamics of Forest Ecosystems in the Poyang Lake Basin Responding to Afforestation and Future Climate Change

2013 ◽  
Vol 4 (1) ◽  
pp. 11-19 ◽  
Author(s):  
Zhou Lei ◽  
Wang Shaoqiang ◽  
Ju Weimin ◽  
Xiong Zhe ◽  
Georg Kindermann ◽  
...  
Keyword(s):  
Climate Change ◽  
Forest Ecosystems ◽  
Poyang Lake ◽  
Carbon Dynamics ◽  
Future Climate ◽  
Future Climate Change ◽  
Lake Basin ◽  
Poyang Lake Basin
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