2 papers
physics.ao-ph2025
Low latency global carbon budget reveals a continuous decline of the land carbon sink during the 2023/24 El Nino event
Piyu Ke, Philippe Ciais, Yitong Yao +28
The high growth rate of atmospheric CO2 in 2023 was found to be caused by a severe reduction of the global net land carbon sink. Here we update the global CO2 budget from January 1…
physics.ao-ph2022
Handling errors in four-dimensional variational data assimilation by balancing the degrees of freedom and the model constraints: A new approach
Xiangjun Tian, Hongqin Zhang, Zhe Jin +5
For many years, strongly and weakly constrained approaches were the only options to deal with errors in four-dimensional variational data assimilation (4DVar), with the aim of bala…