scholarly journals THE SPATIOTEMPORAL FLUCTUATION AND SPATIAL DISTRIBUTION CHARACTERISTICS IN ATMOSPHERIC CO2 CONCENTRATION ON A GLOBAL SCALE

2004 ◽  
Vol 48 ◽  
pp. 91-96
Author(s):  
Tamotsu SHIMIZU ◽  
Masahiko HASEBE ◽  
Yoshiharu SUZUKI ◽  
Mikio HINO
Keyword(s):  
Spatial Distribution ◽  
Co2 Concentration ◽  
Global Scale ◽  
Atmospheric Co2 ◽  
Distribution Characteristics ◽  
Atmospheric Co2 Concentration ◽  
Spatial Distribution Characteristics

scholarly journals Relative importance of increased atmospheric CO<sub>2</sub> concentration and local moisture deficit to hot extremes

2020 ◽  
Author(s):  
Ajiao Chen ◽  
Huade Guan ◽  
Okke Batelaan
Keyword(s):  
Soil Moisture ◽  
Standardized Precipitation Index ◽  
Co2 Concentration ◽  
Global Scale ◽  
Atmospheric Co2 ◽  
Atmospheric Co2 Concentration ◽  
Moisture Deficit ◽  
Global Action ◽  
Terrestrial Water ◽  
Local Moisture

Abstract. This study identifies which factor, increased atmospheric CO2 concentration or local moisture deficit, dominates the temporal occurrence of hot extremes at the global scale. The wavelet decomposed GRACE Terrestrial Water Storage (TWS) is for the first time applied in examining the relationship between soil moisture (θ) and number of hot days in the hottest month (NHD). It reveals stronger θ–NHD relationships over larger areas than other commonly used soil moisture proxies (i.e., standardized precipitation index (SPI) and model derived product). During the study period 1985–2015, hot extreme occurrence with a dominant influence from increased atmospheric CO2 concentration is mainly observed in South America, Africa and Asia, while soil moisture deficit dominates the occurrence of hot extremes in larger areas, including parts of North America, West Europe, Australia, Southeast Asia and South Africa. Global action in reducing emissions will support combating hot extremes. In addition, important attention should be directed to address, e.g. by adaptive land management, the increasing moisture deficit in some regions.

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