Spatial and Temporal Variations in Vegetation Cover and Responses to Climatic Variables in the Daqing River Basin, North China

2019 ◽  
Vol 93 (sp1) ◽  
pp. 450
Author(s):  
Hao Cui ◽  
Weihua Xiao ◽  
Yuyan Zhou ◽  
Baodeng Hou ◽  
Fan Lu ◽  
...  
Keyword(s):  
River Basin ◽  
Vegetation Cover ◽  
North China ◽  
Temporal Variations ◽  
Climatic Variables ◽  
Spatial And Temporal Variations

scholarly journals Spatial and temporal variations of CO<sub>2</sub> mole fractions observed at Beijing, Xianghe and Xinglong in North China

2021 ◽  
Author(s):  
Yang Yang ◽  
Minqiang Zhou ◽  
Ting Wang ◽  
Bo Yao ◽  
Pengfei Han ◽  
...  
Keyword(s):  
Seasonal Variations ◽  
Human Activities ◽  
North China ◽  
Terrestrial Ecosystem ◽  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
Boundary Layer Height ◽  
The Mean ◽  
The Impact ◽  
First Time

Abstract. Atmospheric CO2 mole fractions are observed at Beijing (BJ), Xianghe (XH), and Xinglong (XL) in North China using the Picarro G2301 Cavity Ring-Down Spectroscopy instruments. The measurement system is described comprehensively for the first time. The geo-distances among these three sites are within 200 km, but they have very different surrounding environments: BJ is inside the megacity; XH is in the suburban area; XL is in the countryside on a mountain. The mean and standard deviation of CO2 mole fractions at BJ, XH, and XL between October 2018 and September 2019 are 448.4 ± 12.8 ppm, 436.0 ± 9.2 ppm and 420.6 ± 8.2 ppm, respectively. The seasonal variations of CO2 at these three sites are similar, with a maximum in winter and a minimum in summer, which is dominated by the terrestrial ecosystem. However, the seasonal variations of CO2 at BJ and XH are more affected by human activities as compared to XL. By using CO2 at XL as the background, CO2 enhancements are observed simultaneously at BJ and XH. The diurnal variations of CO2 are driven by the boundary layer height, photosynthesis and human activities at BJ, XH and XL. Moreover, we address the impact of the wind on the CO2 mole fractions at BJ and XL. This study provides an insight into the spatial and temporal variations of CO2 mole fractions in North China.

The spatio-temporal variations of vegetation cover in the Yellow River Basin from 2000 to 2010

2013 ◽  
Vol 33 (24) ◽  
Author(s):  
袁丽华 YUAN Lihua ◽  
蒋卫国 JIANG Weiguo ◽  
申文明 SHEN Wenming ◽  
刘颖慧 LIU Yinghui ◽  
王文杰 WANG Wenjie ◽  
...  
Keyword(s):  
River Basin ◽  
Vegetation Cover ◽  
Yellow River ◽  
Yellow River Basin ◽  
Temporal Variations ◽  
The Yellow River ◽  
Spatio Temporal ◽  
The Yellow River Basin

scholarly journals Spatial and Temporal Variations of Snow Cover in the Karoon River Basin, Iran, 2003–2015

Water ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 965 ◽  
Author(s):  
Mohammad Keikhosravi Kiany ◽  
Seyed Masoodian ◽  
Robert Balling ◽  
Bohumil Svoma
Keyword(s):  
Snow Cover ◽  
River Basin ◽  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
Karoon River

Mapping Spatial and Temporal Variations of Leaf Area Index for Winter Wheat in North China

2007 ◽  
Vol 6 (12) ◽  
pp. 1437-1443 ◽  
Author(s):  
Peng YANG ◽  
Wen-bin WU ◽  
Hua-jun TANG ◽  
Qing-bo ZHOU ◽  
Jin-qiu ZOU ◽  
...  
Keyword(s):  
Winter Wheat ◽  
Leaf Area Index ◽  
Leaf Area ◽  
North China ◽  
Temporal Variations ◽  
Spatial And Temporal Variations ◽  
Area Index
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