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Rachmayani, Rima; Prange, Matthias; Schulz, Michael (2015): Model results in NetCDF format of North African vegetation-precipitation in early and mid-Holocene climate simulated by CCSM3-DGVM//. PANGAEA, https://doi.org/10.1594/PANGAEA.846576, Supplement to: Rachmayani, R et al. (2015): North African vegetation–precipitation feedback in early and mid-Holocene climate simulations with CCSM3-DGVM. Climate of the Past, 11(2), 175-185, https://doi.org/10.5194/cp-11-175-2015

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Abstract:
The present study analyses the sign, strength, and working mechanism of the vegetation-precipitation feedback over North Africa in middle (6 ka BP) and early Holocene (9 ka BP) simulations using the comprehensive coupled climate-vegetation model CCSM3-DGVM (Community Climate System Model version 3 and a dynamic global vegetation model). The coupled model simulates enhanced summer rainfall and a northward migration of the West African monsoon trough along with an expansion of the vegetation cover for the early and middle Holocene compared to the pre-industrial period. It is shown that dynamic vegetation enhances the orbitally triggered summer precipitation anomaly by approximately 20% in the Sahara-Sahel region (10-25° N, 20° W-30° E) in both the early and mid-Holocene experiments compared to their fixed-vegetation counterparts. The primary vegetation-rainfall feedback identified here operates through surface latent heat flux anomalies by canopy evaporation and transpiration and their effect on the mid-tropospheric African easterly jet, whereas the effects of vegetation changes on surface albedo and local water recycling play a negligible role. Even though CCSM3-DGVM simulates a positive vegetation-precipitation feedback in the North African region, this feedback is not strong enough to produce multiple equilibrium climate-ecosystem states on a regional scale.
Further details:
Coverage:
Median Latitude: 17.500000 * Median Longitude: 5.000000 * South-bound Latitude: 10.000000 * West-bound Longitude: -20.000000 * North-bound Latitude: 25.000000 * East-bound Longitude: 30.000000
Event(s):
Sahara-Sahel_region * Latitude Start: 10.000000 * Longitude Start: -20.000000 * Latitude End: 25.000000 * Longitude End: 30.000000 * Device: Model (Model)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DescriptionDescriptionRachmayani, Rima
2File nameFile nameRachmayani, Rima
3File sizeFile sizekByteRachmayani, Rima
4File formatFile formatRachmayani, Rima
5Uniform resource locator/link to model result fileURL modelRachmayani, Rima
Size:
30 data points

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