Atmospheric forcing datasets for the Ice Algae Model Intercomparison Project phase 2 (IAMIP2) projection experiments v1.0

Full description

This dataset provides the atmospheric forcing fields for conducting the projection experiment for the Ice Algae Model Intercomparison Project phase 2 (IAMIP2), which is a new model intercomparison effort focused on algae that are attached to sea ice.

It is based on the first ensemble member (r1i1p1f1) output of the three CMIP6 projections: CMCC-ESM2 ssp126, EC-Earth3 ssp126, CMCC-ESM2 ssp585. These complement the EC-Earth3 ssp585 based forcing previously published as 'EC-Earth3 SSP585 atmospheric forcing dataset for the Ice Algae Model Intercomparison Project phase 2 (IAMIP2) projection experiment v1.0', in this same collection. Each dataset contains the near-surface atmospheric variables for driving the sea ice-ocean coupled models over 2015-2100, prepared for the projection experiment of the Ice Algae Model Intercomparison Project phase 2 (IAMIP2). The dataset is interpolated to the JRA55-do v1.4 grid (Tsujino, H. and al., 2018), to make it easy for using it in ocean and sea-ice models. 

This dataset is a global product of 0.5-degree resolution near-surface atmospheric variables over the period 2015-2100. The variables included in the dataset are:

tas - surface air temperature

vas - surface northward wind 

uas - surface eastward wind 

huss - surface specific humidity

licalvf - land ice calving flux

psl - sea level pressure

rsds - surface downwelling shortwave radiation flux

rlds -surface downwelling longwave radiation flux

friver - water flux into sea water from rivers 

prra - rainfall flux

prsn - snowfall flux

The code to interpolate JRA55-do v1.4 is available on github and published on zenodo (Hakase H., 2021)

In particular:

• `cdo -remapnn` was used for the river runoff into sea water (friver) variable and `cdo -remapcon` for all others. 
• rainfall flux (prra), which is not available from CMCC-ESM2 and EC-Earth3, was derived from snowfall flux (prsn) and total precipitation (pr)  
• the land ice calving flux (licalvf) is not available from CMCC-ESM2 and EC-Earth3 so the original JRA55-do v1.4.0 values were prescribed for it. 

References:

Hayashida, H. (2021, July 28). hakaseh/prep_iamip2_forcing: Atmospheric forcing datasets for the IAMIP2 projection experiments (4 projections) (Version v1.1). Zenodo. http://doi.org/10.5281/zenodo.5140591

Hayashida, H., Jin, M., Steiner, N. S., Swart, N. C., Watanabe, E., Fiedler, R., Hogg, A. McC., Kiss, A. E., Matear, R. J., and Strutton, P. G.: Ice Algae Model Intercomparison Project phase 2 (IAMIP2), Geosci. Model Dev. Discuss. [preprint], https://doi.org/10.5194/gmd-2020-305, in review, 2020.

EC-Earth Consortium (EC-Earth) (2019). EC-Earth-Consortium EC-Earth3 model output prepared for CMIP6 ScenarioMIP ssp585. Version v20200310. Earth System Grid Federation. https://doi.org/10.22033/ESGF/CMIP6.4912

Tsujino, Hiroyuki; Urakawa, Shogo; Nakano, Hideyuki; Small, R. Justin; Kim, Who M.; Yeager, Stephen G.; Danabasoglu, Gokhan; Suzuki, Tatsuo; Bamber, Jonathan L; Bentsen, Mats; Boening, Claus; Bozec, Alexandra; Chassignet, Eric; Curchitser, Enrique; Dias, Fabio Boeira; Durack, Paul J.; Griffies, Stephen M.; Harada, Yayoi; Ilicak, Mehmet; Josey, Simon; Kobayashi, Chiaki; Kobayashi, Shinya; Komuro, Yoshiki; Large, William G.; Le Sommer, Julien; Marsland, Simon; Masina, Simona; Scheinert, Markus; Tomita, Hiroyuki; Valdivieso, Maria; Yamazaki, Dai (2018).input4MIPs.CMIP6.OMIP.MRI. Version 1.4.0 .Earth System Grid Federation. https://doi.org/10.22033/ESGF/input4MIPs.10460