Correlation between ENSO and Total Water Storage Change Anomaly with Extreme Weather Events over Amazon Basin from 2010 to 2016 Estimated from GRACE and Hydroclimatic Data
Abstract Extreme weather events in the Amazon basin, which have occurred frequently in recent years, are generally considered to be associated with the abnormal change of rainfall, due to their strong correlation with each other. The occurrence of the El Nino/southern oscillation (ENSO) events are important factors leading to abnormal changes in rainfall. Because several extreme weather events since 2010 happened just after ENSO, it is very important to understand the impact of ENSO on the Amazon basin. Using GRACE gravity field solutions, the total water storage change (TWSC) in Amazon basin from July 2009 to April 2017 is estimated. The correlation between TWSC and ENSO index are proved to be strong with a certain time lag when trend and seasonal signals are removed. Then the different effects of ENSO on Amazon basin during dry and rainy seasons are analyzed. The results show that the dry season is significantly affected by ENSO while the rainy season is less affected. Finally, the results show that ENSO can affect TWSC in certain area by influencing the rainfall is found when combined with the hydroclimatic data analysis. This phenomenon is more prominent in the two extreme droughts in Amazon basin.
JIN Zhongwei,IN Taoyong. Correlation between ENSO and Total Water Storage Change Anomaly with Extreme Weather Events over Amazon Basin from 2010 to 2016 Estimated from GRACE and Hydroclimatic Data[J]. jgg, 2019, 39(2): 199-203.
JIN Zhongwei,IN Taoyong. Correlation between ENSO and Total Water Storage Change Anomaly with Extreme Weather Events over Amazon Basin from 2010 to 2016 Estimated from GRACE and Hydroclimatic Data[J]. jgg, 2019, 39(2): 199-203.
