Knowledge Resource Center for Ecological Environment in Arid Area
| DOI | 10.2166/wcc.2021.187 |
| Spreading of the semi-arid climate across South Africa | |
| Jury, Mark R. | |
| 通讯作者 | Jury, MR (corresponding author), Univ Zululand, Kwa Dlangezwa, South Africa. ; Jury, MR (corresponding author), Univ Puerto Rico, Mayaguez, PR 00682 USA. |
| 来源期刊 | JOURNAL OF WATER AND CLIMATE CHANGE
 |
| ISSN | 2040-2244 |
| EISSN | 2408-9354 |
| 出版年 | 2021 |
| 卷号 | 12期号:8页码:3734-3749 |
| 英文摘要 | The eastward shift of semi-arid climate across South Africa is studied using satellite assimilated cloud cover, vegetation temperature and potential evaporation 1981-2019, and 21st century coupled model projections. Semi-arid thresholds over the plateau have shifted hundreds of kilometers eastward in the Vaal River catchment for potential evaporation, cloud fraction, and vegetation temperature. Coastal cloudiness has also changed due to sea breezes modified by shelf zone sea temperatures. Processes underlying the spread of semi-arid conditions across South Africa are quantified. Desiccation is related to greater westerly airflow, as the atmospheric boundary layer over the Kalahari preferentially links with the upper-level circulation. Warm dry spells and climate change enhance the meridional temperature gradient and accelerate the sub-tropical jet at both short- and long timescales. According to observations and reanalysis, dry westerlies prevail during the afternoon and induce +0.2 degrees C/year trends in vegetation temperature over the Highveld during the study period. Coupled model projections show that semi-arid conditions expand eastward from Bloemhof (25.5 degrees E) by 50,000 km(2), altering future adaptation strategies. |
| 英文关键词 | coupled model projections eastward drying trend satellite measurements South Africa |
| 类型 | Article |
| 语种 | 英语 |
| 开放获取类型 | gold |
| 收录类别 | SCI-E |
| WOS记录号 | WOS:000729941100016 |
| WOS关键词 | WATER-RESOURCES ; TRENDS ; MODEL ; CIRCULATION ; SENSITIVITY ; VEGETATION |
| WOS类目 | Water Resources |
| WOS研究方向 | Water Resources |
| 资源类型 | 期刊论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/373996 |
| 作者单位 | [Jury, Mark R.] Univ Zululand, Kwa Dlangezwa, South Africa; [Jury, Mark R.] Univ Puerto Rico, Mayaguez, PR 00682 USA |
| 推荐引用方式 GB/T 7714 | Jury, Mark R.. Spreading of the semi-arid climate across South Africa[J],2021,12(8):3734-3749. |
| APA | Jury, Mark R..(2021).Spreading of the semi-arid climate across South Africa.JOURNAL OF WATER AND CLIMATE CHANGE,12(8),3734-3749. |
| MLA | Jury, Mark R.."Spreading of the semi-arid climate across South Africa".JOURNAL OF WATER AND CLIMATE CHANGE 12.8(2021):3734-3749. |
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