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Climate Change and Its Impact on the Eco-Environment of the Three-Rivers Headwater Region on the Tibetan Plateau, China.

Jiang C, Zhang L - Int J Environ Res Public Health (2015)

Bottom Line: Moreover, annual runoff in the Lancang (LRB) and Yangtze (YARB) river basins showed an increasing trend, compared to a slight decrease in the Yellow River Basin (YRB).The water temperature in the YRB and YARB increased significantly from 1958 to 2007 (p < 0.001), driven by air temperature changes.A clear regional warming trend caused an obvious increasing trend in glacier runoff, with a maximum value observed in the 2000s.

View Article: PubMed Central - PubMed

Affiliation: College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China. jiangchong1987@gmail.com.

ABSTRACT
This study analyzes the impact of climate change on the eco-environment of the Three-Rivers Headwater Region (TRHR), Tibetan Plateau, China. Temperature and precipitation experienced sharp increases in this region during the past 57 years. A dramatic increase in winter temperatures contributed to a rise in average annual temperatures. Moreover, annual runoff in the Lancang (LRB) and Yangtze (YARB) river basins showed an increasing trend, compared to a slight decrease in the Yellow River Basin (YRB). Runoff is predominantly influenced by rainfall, which is controlled by several monsoon systems. The water temperature in the YRB and YARB increased significantly from 1958 to 2007 (p < 0.001), driven by air temperature changes. Additionally, owing to warming and wetting trends in the TRHR, the net primary productivity (NPP) and normalized difference vegetation index (NDVI) showed significant increasing trends during the past half-century. Furthermore, although an increase in water erosion due to rainfall erosivity was observed, wind speeds declined significantly, causing a decline in wind erosion, as well as the frequency and duration of sandstorms. A clear regional warming trend caused an obvious increasing trend in glacier runoff, with a maximum value observed in the 2000s.

No MeSH data available.


Related in: MedlinePlus

Temporal variations in water temperature anomalies at (a) Tangnaihai and (b) Batang stations in the Yellow (YRB) and Yangtze (YARB) river basins.
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ijerph-12-12057-f007: Temporal variations in water temperature anomalies at (a) Tangnaihai and (b) Batang stations in the Yellow (YRB) and Yangtze (YARB) river basins.

Mentions: From 1958 to 2007, the water temperature anomaly in the Tangnaihai and Batang stations of the YRB and YARB increased significantly at rates of 0.15 °C/10 a (p < 0.001) and 0.16 °C/10 a (p < 0.001), respectively (Figure 7). The anomaly at Tangnaihai station varied between −0.96 °C in 1963 and 0.75 °C in 2005, with a range of about 1.71 °C. The anomaly at Batang station varied between −0.76 °C in 1965 and 1.91 °C in 1993, with a range of about 2.67 °C. The water temperature correlated positively with air temperature at these two stations, with respective correlation coefficients of 0.85 and 0.87. Solar radiation provides the heat source for first air and then water; therefore, the water temperature change lags behind that of air on a daily scale. On an annual scale, however, water and air temperature changes are consistent. Owing to the regional warming trend over the last half-century, the water temperature also exhibited a warming trend.


Climate Change and Its Impact on the Eco-Environment of the Three-Rivers Headwater Region on the Tibetan Plateau, China.

Jiang C, Zhang L - Int J Environ Res Public Health (2015)

Temporal variations in water temperature anomalies at (a) Tangnaihai and (b) Batang stations in the Yellow (YRB) and Yangtze (YARB) river basins.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4626955&req=5

ijerph-12-12057-f007: Temporal variations in water temperature anomalies at (a) Tangnaihai and (b) Batang stations in the Yellow (YRB) and Yangtze (YARB) river basins.
Mentions: From 1958 to 2007, the water temperature anomaly in the Tangnaihai and Batang stations of the YRB and YARB increased significantly at rates of 0.15 °C/10 a (p < 0.001) and 0.16 °C/10 a (p < 0.001), respectively (Figure 7). The anomaly at Tangnaihai station varied between −0.96 °C in 1963 and 0.75 °C in 2005, with a range of about 1.71 °C. The anomaly at Batang station varied between −0.76 °C in 1965 and 1.91 °C in 1993, with a range of about 2.67 °C. The water temperature correlated positively with air temperature at these two stations, with respective correlation coefficients of 0.85 and 0.87. Solar radiation provides the heat source for first air and then water; therefore, the water temperature change lags behind that of air on a daily scale. On an annual scale, however, water and air temperature changes are consistent. Owing to the regional warming trend over the last half-century, the water temperature also exhibited a warming trend.

Bottom Line: Moreover, annual runoff in the Lancang (LRB) and Yangtze (YARB) river basins showed an increasing trend, compared to a slight decrease in the Yellow River Basin (YRB).The water temperature in the YRB and YARB increased significantly from 1958 to 2007 (p < 0.001), driven by air temperature changes.A clear regional warming trend caused an obvious increasing trend in glacier runoff, with a maximum value observed in the 2000s.

View Article: PubMed Central - PubMed

Affiliation: College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China. jiangchong1987@gmail.com.

ABSTRACT
This study analyzes the impact of climate change on the eco-environment of the Three-Rivers Headwater Region (TRHR), Tibetan Plateau, China. Temperature and precipitation experienced sharp increases in this region during the past 57 years. A dramatic increase in winter temperatures contributed to a rise in average annual temperatures. Moreover, annual runoff in the Lancang (LRB) and Yangtze (YARB) river basins showed an increasing trend, compared to a slight decrease in the Yellow River Basin (YRB). Runoff is predominantly influenced by rainfall, which is controlled by several monsoon systems. The water temperature in the YRB and YARB increased significantly from 1958 to 2007 (p < 0.001), driven by air temperature changes. Additionally, owing to warming and wetting trends in the TRHR, the net primary productivity (NPP) and normalized difference vegetation index (NDVI) showed significant increasing trends during the past half-century. Furthermore, although an increase in water erosion due to rainfall erosivity was observed, wind speeds declined significantly, causing a decline in wind erosion, as well as the frequency and duration of sandstorms. A clear regional warming trend caused an obvious increasing trend in glacier runoff, with a maximum value observed in the 2000s.

No MeSH data available.


Related in: MedlinePlus