Atmospheric Methane Growth Rate in 2020 and 2021

1. INVs.tar.gz – The global gridded surface methane fluxes (2019–2021) inferred from an ensemble of six atmospheric inversions by PYVAR-LMDZ-SACS, each using a combination of three different methane concentration observation datasets for constraints (SURF, GSNIES and GSUoL) and two physical parameterisations for the transport model LMDZ (LMDZ AR3 version and LMDZ AR6 version).2. LMDZ-INCA_OH.tar.gz – The prescribed OH and O(¹D) fields (2019–2021) used in atmospheric inversions, which were simulated by a chemistry-climate model LMDZ-INCA with a full tropospheric photochemistry scheme.3. ANTHROP_EMIS_2019-2021.nc – The global gridded anthropogenic methane emissions (2019–2021) compiled from a combination of existing inventories.4. WEMs.tar.gz – The global wetland methane emissions (2015–2021) simulated by two process-based wetland emission models (WEMs) ORCHIDEE-MICT and LPJ-wsl, forced by four climate forcing datasets (CRU, ERA5, MERRA2 and MSWEP). For ORCHIDEE-MICT in particular, two wetland maps (RFW and GIEMS-2) were used to calibrate the parameters in simulating the wetland area dynamics. Combining two wetland maps for ORCHIDEE-MICT and one for LPJ with four climate datasets, a total of 12 simulations of wetland methane emissions were included in our analyses.For more information, please refer to Lin et al. Recent methane surges reveal heightened emissions from tropical inundated areas.

1. INVs.tar.gz —— 由PYVAR-LMDZ-SACS基于6套大气反演集合推演得到的全球网格化地表甲烷通量数据集（2019–2021年）；该反演集合分别采用3套甲烷浓度观测数据集（SURF、GSNIES与GSUoL）作为约束条件，并为传输模型LMDZ选用2套物理参数化方案（LMDZ AR3版本与LMDZ AR6版本）。
2. LMDZ-INCA_OH.tar.gz —— 大气反演过程中使用的预设OH与O(¹D)场数据集（2019–2021年），由搭载完整对流层光化学方案的化学-气候模式LMDZ-INCA模拟生成。
3. ANTHROP_EMIS_2019-2021.nc —— 整合多套现有排放清单得到的全球网格化人为甲烷排放数据集（2019–2021年）。
4. WEMs.tar.gz —— 由2套基于过程的湿地甲烷排放模型（WEMs）ORCHIDEE-MICT与LPJ-wsl，在4套气候强迫数据集（CRU、ERA5、MERRA2与MSWEP）驱动下模拟得到的全球湿地甲烷排放数据集（2015–2021年）。其中针对ORCHIDEE-MICT模型，额外采用2套湿地分布图（RFW与GIEMS-2）对湿地面积动态模拟的参数进行校准。结合ORCHIDEE-MICT的2套湿地分布图、LPJ-wsl的1套湿地分布图，以及4套气候强迫数据集，本次分析中共纳入12组湿地甲烷排放模拟结果。

更多详情请参阅Lin等人的研究：《近期甲烷激增揭示热带淹没区域排放加剧》。