GSWP-2 Sensitivity studies

Updated: 9 September 2004

P1 correction! - The precipitation files to use for P1 were listed incorrectly below. The files listed were not hybrid ERA-40 precipitation. They were the original ERA-40 precipitation. We have added a new experiment PE to represent what we had intended originally in P1 (see the updated table below).

We ask everyone doing P2 and/or P3 to perform PE as part of the precipitation suite. If you have already submitted Suite B, we ask for PE to be submitted as part of Suite C, with the 15 October deadline.
If you have already submitted P1, we will use it. It would be especially useful, though, if you also do P4. That will give us a direct comparison between the original ERA-40 and NCEP/DOE precipitation.

R3 has been added - ISCCP radiation (thanks to Yuanchong Zhang and Bill Rossow for providing us with this data). This is an observationally-based alternative to the SRB radiation used in the baseline simulation. It does not have the problems at the month boundaries that SRB does, and uses a different set of retrieval and QC algorithms than SRB. You may wish to try this as an alternative to SRB or reanalysis radiation, but see the FAQ page for information on how the time averaging has been performed for this product (it is different than the other radiations). Please see the ISCCP web site for more information on this product.

B0 - Please feel free to continue to submit baseline runs to the ICC.

Suite A: R1, N1, I1 please submit daily output data to ICC by 15 May.
Suite B: P1, P2, P3 please submit daily output data to ICC by 31 August.
Suite C: PE, V1, M1, M2 please submit daily output data to ICC by 15 October.

For all sensitivity studies: Please start integrations from your 0000UTC 1 Jan 1986 restart file from the B0 simulation (after completing spin-up). There is no need to re-initialize these integrations. Part of the study will be to examine how the LSS model climates respond to the change in forcing and re-equilibrate during 1986.

Exp	Description	Status	Fields	Files
B0	Baseline integration	Complete		As given in Table 6
P1	ERA-40 precipitation (no observational data)	Due 31 Aug.	Rainf Snowf Rainf_C	rainf_era snowf_era rainf_c_era
PE	Hybrid ERA-40 precipitation (instead of NCEP/DOE)	Due 15 Oct.	Rainf Snowf Rainf_C	rainf_eragswp snowf_eragswp rainf_c_eragswp
P2	NCEP/DOE hybrid with GPCC corrected for gauge undercatch (no satellite data)	Due 31 Aug.	as above	rainf_gpccwc snowf_gpccwc, rainf_c_gpccwc
P3	NCEP/DOE hybrid with GPCC (no undercatch correction)	Due 31 Aug.	as above	rainf_gpcc, snowf_gpcc, rainf_c_gpcc
P4	NCEP/DOE precipitation (no observational data)	Ready	as above	rainf_ncep, snowf_ncep, rainf_c_ncep
P5	NCEP/DOE hybrid with Xie daily gauge precipitation	Withdrawn	as above	rainf_xie, snowf_xie, rainf_c_xie
R1	NCEP/DOE radiation	Due 15 May	LWdown SWdown	lwdown_ncep swdown_ncep
RS	NCEP/DOE shortwave only	Ready	SWdown	swdown_ncep
RL	NCEP/DOE longwave only	Ready	LWdown	lwdown_ncep
R2	ERA-40 radiation	Ready	LWdown SWdown	lwdown_era swdown_era
R3	ISCCP radiation	Ready	LWdown SWdown	lwdown_isccp swdown_isccp
M1	All NCEP meteorological data (no hybridization with observational data)	Due 15 Oct.	Tair, Qair, LWdown, SWdown, Rainf, Snowf, Rainf_C	*_ncep
M2	All ECMWF meteorological data (no hybridization with observational data)	Due 15 Oct.	Tair, Qair, Wind, Psurf, LWdown, SWdown, Rainf, Snowf, Rainf_C	*_era
V1	U.Maryland vegetation class data	Due 15 Oct.	VegClass	vegclass_umcp
I1	Climatological vegetation	Due 15 May	LAI, Albedo, grnFrac, NDVI, FPAR, Z0Surf, DisplH	_mean_
N1	Native Parameters	Due 15 May	All vegetation and soil parameters	Use default model parameters instead of GSWP fields (exception: GSWP landmask must be used)

Class	Name	Description
0	Water bodies	Oceans, seas, lakes, reservoirs, and rivers, which can be either fresh or salt water.
1	Evergreen Needleleaf Forests	Lands dominated by trees with a percent canopy cover >60% and height exceeding 5m. Almost all trees remain green all year. Canopy is never without green foliage.
2	Evergreen Broadleaf Forests	Lands dominated by trees with a percent canopy cover >60% and height exceeding 5m. Almost all trees remain green all year. Canopy is never without green foliage.
3	Deciduous Needleleaf Forests	Lands dominated by trees with a percent canopy cover >60% and height exceeding 5m. Trees shed their leaves simultaneously in response to cold seasons.
4	Deciduous Broadleaf Forests	Lands dominated by trees with a percent canopy cover >60% and height exceeding 5m. Trees shed their leaves simultaneously in response to dry or cold seasons.
5	Mixed Forests	Lands dominated by trees with a percent canopy cover >60% and height exceeding 5m. Consists of tree communities with interspersed mixtures or mosaics of needleleaf and deciduous forest types. Neither type has <25% or >75% landscape coverage.
6	Woodlands	Lands with herbaceous or woody understories and tree canopy cover of >40% and <60%. Trees exceed 5m in height and can be either evergreen or deciduous.
7	Wooded Grasslands/Shrublands	Lands with herbaceous or woody understories and tree canopy cover of >10% and <40%. Trees exceed 5m in height and can be either evergreen or deciduous.
8	Closed Bushlands or Shrublands	Lands dominated by bushes or shrubs. Bush and shrub percent canopy cover is > 40%. Bushes do not exceed 5m in height. Shrubs or bushes can be either evergreen or deciduous. Tree canopy cover is < 10%. The remaining cover is either barren or herbaceous.
9	Open Shrubland	Lands dominated by shrubs. Shrub canopy cover is > 10% and < 40%. Shrubs do not exceed 2m in height and can be either evergreen or deciduous. The remaining cover is either barren or of annual herbaceous type.
10	Grasslands	Lands with continuous herbaceous cover and <10% tree or shrub canopy cover.
11	Croplands	Lands with >80% of the landscape covered in crop-producing fields. Note that perennial woody crops will be classified as the appropriate forest or shrubs land cover type.
12	Barren	Lands of exposed soil, sand, rocks, snow or ice which never have more than 10% vegetated cover during any time of year.
13	Urban and Built-up	Land covered by buildings and other man-made structures. Note that this class is not mapped from the AVHRR imagery but is developed from the populated places layer that is part of the Digital Chart of the World (Danko 1992).
14	Missing Data	Points where the ISLSCP2 land/sea mask was labeled as land and the UMD original data had sea and which could not be filled in from a 3 by 3 average of surrounding cells.