Southern Hemisphere winds, pressure, and temperature over the 20th century from proxy-data assimilation

This archive contains four reconstructions of annually resolved zonal surface wind (us), sea level pressure (psl), and surface temperature (tas) anomalies in the Southern Hemisphere over the period 1900 to 2005 CE. The anomaly reference period is 1961-1990. 

The reconstructions are generated using the Last Millennium Reanalysis data assimilation framework (Hakim et al., 2016; Tardif et al., 2019). The proxies assimilated come from a global database comprising the PAGES2k database (PAGES2k Consortium, 2017), additional ice core accumulation records (Thomas et al., 2017), and additional coral records (Sanchez et al., 2021). We use four climate models to produce the four reconstructions:

1. the iCESM Last Millennium Ensemble (“CESM LM”, Brady et al., 2019, Stevenson et al., 2019)
2. the HadCM3 Last Millennium Ensemble (“HadCM3 LM”, Collins et al., 2001)
3. the CESM1 Large Ensemble (“LENS”; Kay et al., 2015)
4. the CESM1 Pacific Pacemaker Ensemble (“PACE”; Schneider and Deser, 2018).

The four reconstructions are named after the prior that is used. The last millennium ensemble of simulations include natural forcings only and the LENS and PACE ensemble of simulations include historical external forcings. For each reconstruction, there are three netCDF files containing the ensemble mean (mean of 100 ensemble members) for each climate field. More details can be found in O'Connor et al. (2021).

Please cite O'Connor et al. (2021) when using these datasets. https://doi.org/10.1029/2021GL095999