the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Vegetation dynamics and responses to climate anomalies in East Africa
Abstract. Vegetation plays a key role in the global climate system via modification of the water and energy balance. Its coupling to climate is therefore important, particularly in the tropics where severe climate change impacts are expected. Consequently, understanding vegetation dynamics and response to present and projected climatic conditions for various land cover types in East Africa is vital. This study provides an assessment of the vegetation trends in East Africa using Leaf Area Index (LAI) time series for the period 1982 to 2011, regression analysis between LAI and Standardised Precipitation Evapotranspiration Index (SPEI), as well as analysis of the temporal non-stationarity in the LAI trends and vegetation response to climate. Our results show mean LAI over the region increased at a rate of about 4 × 10−3 units per year, while the rate of increase for annual mean temperature was 0.035 °C per year. Annual precipitation did not show significant trends. Trend breaks and variations in the stability of LAI time series anomalies significantly alter the LAI trends across the period of study. Drought and wetness conditions also show significant influence on the vegetation dynamics in the region. Given the potential impacts of climate change on vegetation productivity in this region, this study provides the much-needed reference point for the disentanglement of historical climatic- and human-induced vegetation dynamics. In addition, the results indicate key areas of interest for the assessment of potential impacts of vegetation dynamics on land surface water and energy balance in the region.
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RC1: 'Manuscript “Vegetation dynamics and responses to climate anomalies in East Africa”', Anonymous Referee #1, 21 Feb 2018
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RC2: 'General comments', Anonymous Referee #2, 21 Feb 2018
- AC2: 'Interactive comment on “Vegetation dynamics and responses to climate anomalies in East Africa” by John Musau et al.', John Musau, 19 Mar 2018
- AC1: 'Interactive comment on "Vegetation dynamics and responses to climate anomalies in East Africa" by John Musau et al.', John Musau, 19 Mar 2018
-
RC2: 'General comments', Anonymous Referee #2, 21 Feb 2018
-
RC1: 'Manuscript “Vegetation dynamics and responses to climate anomalies in East Africa”', Anonymous Referee #1, 21 Feb 2018
-
RC2: 'General comments', Anonymous Referee #2, 21 Feb 2018
- AC2: 'Interactive comment on “Vegetation dynamics and responses to climate anomalies in East Africa” by John Musau et al.', John Musau, 19 Mar 2018
- AC1: 'Interactive comment on "Vegetation dynamics and responses to climate anomalies in East Africa" by John Musau et al.', John Musau, 19 Mar 2018
-
RC2: 'General comments', Anonymous Referee #2, 21 Feb 2018
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Cited
6 citations as recorded by crossref.
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- Analyzing intensifying thunderstorms over the Congo Basin using the Gálvez-Davison index from 1983–2018 K. Alber et al. 10.1007/s00382-020-05513-x
- Prediction of volatility and seasonality vegetation by using the GARCH and Holt-Winters models V. Kumar et al. 10.1007/s10661-024-12437-0
- Spatiotemporal climate and vegetation greenness changes and their nexus for Dhidhessa River Basin, Ethiopia G. Wedajo et al. 10.1186/s40068-019-0159-8
- Climate-driven abrupt changes in plant communities of desert and semi-desert region R. Bagheri et al. 10.1007/s00704-021-03720-y
- Estimation des rendements fourragers des pâturages dans les espaces climatiques du Burkina Faso à partir de données satellitaires W. Some et al. 10.19182/remvt.37009