CMIP6 LOCA2 Monthly Water Balance Model Projections 1950-2100 for the Contiguous United States

A monthly water-balance model (MWBM) is applied to simulate components of the water balance for the period 1950-2100 under ssp245, ssp370, and ssp585 scenarios for the Contiguous United States. The statistically downscaled LOCA2 temperature and precipitation projections from 27 GCMs from the Climate Model Intercomparison Program Phase 6 (CMIP6) are use as input to the water balance model. This data set supports the USGS National Climate Change Viewer (ver. 2). The statistically downscaled data set is: CMIP6-LOCA2: Localized Constructed Analogs (Pierce et al. 2023, bias corrected by a modified version of Livneh et al. 2013) Users interested in the downscaled temperature and precipitation files are referred to the data set home page: LOCA: https://loca.ucsd.edu Bias correction data set: https://cirrus.ucsd.edu/~pierce/nonsplit_precip/ The 27 included GCMs are: ACCESS-CM2, ACCESS-ESM1-5, AWI-CM-1-1-MR, BCC-CSM2-MR, CESM2-LENS, CNRM-CM6-1, CNRM-CM6-1-HR, CNRM-ESM2-1, CanESM5, EC-Earth3, EC-Earth3-Veg, FGOALS-g3, GFDL-CM4, GFDL-ESM4, HadGEM3-GC31-LL, HadGEM3-GC31-MM, INM-CM4-8, INM-CM5-0, IPSL-CM6A-LR, KACE-1-0-G, MIROC6, MPI-ESM1-2-HR, MPI-ESM1-2-LR, MRI-ESM2-0, NorESM2-LM, NorESM2-MM, TaiESM1 There are 72 simulations in total (ssp245=24, ssp370=23, ssp585=25). While the LOCA2 data set supports multiple realizations per model; one MWBM realization per model is provided herein (predominately r1i1p1f1, except when this realization was not available).

本数据集采用月度水量平衡模型（MWBM），针对美国本土（Contiguous United States），在ssp245、ssp370及ssp585三种情景下，模拟1950-2100年时段的水量平衡各组分。本模型的输入数据为气候模式比较计划第六阶段（CMIP6）中27个全球气候模式（GCM）的统计降尺度LOCA2温度与降水预测数据。本数据集可用于支持美国地质调查局（USGS）国家气候变化查看器（版本2）的运行。该统计降尺度数据集为：CMIP6-LOCA2：局地构造相似法（Localized Constructed Analogs，Pierce等，2023；偏差校正方法参考Livneh等2013年研究的改进版本）。若用户需获取降尺度后的温度与降水文件，请访问数据集主页：LOCA：https://loca.ucsd.edu；偏差校正数据集：https://cirrus.ucsd.edu/~pierce/nonsplit_precip/。本次纳入的27个全球气候模式分别为：ACCESS-CM2、ACCESS-ESM1-5、AWI-CM-1-1-MR、BCC-CSM2-MR、CESM2-LENS、CNRM-CM6-1、CNRM-CM6-1-HR、CNRM-ESM2-1、CanESM5、EC-Earth3、EC-Earth3-Veg、FGOALS-g3、GFDL-CM4、GFDL-ESM4、HadGEM3-GC31-LL、HadGEM3-GC31-MM、INM-CM4-8、INM-CM5-0、IPSL-CM6A-LR、KACE-1-0-G、MIROC6、MPI-ESM1-2-HR、MPI-ESM1-2-LR、MRI-ESM2-0、NorESM2-LM、NorESM2-MM、TaiESM1。本数据集共包含72组模拟试验（其中ssp245情景24组、ssp370情景23组、ssp585情景25组）。尽管LOCA2数据集支持每个气候模式提供多组实现试验，但本数据集仅为每个模式提供一组月度水量平衡模型模拟结果（绝大多数为r1i1p1f1方案，若该方案不可用则采用其他替代方案）。