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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

(a) Temporal variations in rainfall erosivity during 1956 to 2012 and in water erosion amounts during 2000 to 2012; (b) spatial changes in water erosion amounts in the TRHR between 2000 and 2012.
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ijerph-12-12057-f009: (a) Temporal variations in rainfall erosivity during 1956 to 2012 and in water erosion amounts during 2000 to 2012; (b) spatial changes in water erosion amounts in the TRHR between 2000 and 2012.

Mentions: From 1956 to 2012, the rainfall erosivity in the TRHR presented a significant increasing trend with a slope of 7.48 MJ mm/(hm2 h a) (p < 0.01), which closely matches the rainfall variability (Figure 9a). The water erosion amount calculated using the USLE model showed similar changes to those observed for rainfall erosivity from 2000 to 2012. A comparison of the water erosion amount in 2000 with that in 2012 revealed a slight increase; however, the erosion per unit area clearly increased from 500 to 2500 t/km2 (Figure 9b). Within the various basins (Figure 9b), the erosion amounts in the YRB and the northwest inland river basin clearly increased, as did the amounts in several individual YARB sections; however, the amounts in other sections decreased, as did the LRB erosion intensity.


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)

(a) Temporal variations in rainfall erosivity during 1956 to 2012 and in water erosion amounts during 2000 to 2012; (b) spatial changes in water erosion amounts in the TRHR between 2000 and 2012.
© Copyright Policy
Related In: Results  -  Collection

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

ijerph-12-12057-f009: (a) Temporal variations in rainfall erosivity during 1956 to 2012 and in water erosion amounts during 2000 to 2012; (b) spatial changes in water erosion amounts in the TRHR between 2000 and 2012.
Mentions: From 1956 to 2012, the rainfall erosivity in the TRHR presented a significant increasing trend with a slope of 7.48 MJ mm/(hm2 h a) (p < 0.01), which closely matches the rainfall variability (Figure 9a). The water erosion amount calculated using the USLE model showed similar changes to those observed for rainfall erosivity from 2000 to 2012. A comparison of the water erosion amount in 2000 with that in 2012 revealed a slight increase; however, the erosion per unit area clearly increased from 500 to 2500 t/km2 (Figure 9b). Within the various basins (Figure 9b), the erosion amounts in the YRB and the northwest inland river basin clearly increased, as did the amounts in several individual YARB sections; however, the amounts in other sections decreased, as did the LRB erosion intensity.

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