التفاصيل البيبلوغرافية
| العنوان: |
A high-resolution spatial assessment of the impacts of drought variability on vegetation activity in Spain from 1981 to 2015. |
| المؤلفون: |
Vicente-Serrano, Sergio M., Azorin-Molina, Cesar, Peña-Gallardo, Marina, Tomas-Burguera, Miquel, Domínguez-Castro, Fernando, Martin-Hernández, Natalia, Beguería, Santiago, Kenawy, Ahmed El, Noguera, Iván, García, Mónica |
| المصدر: |
Natural Hazards & Earth System Sciences Discussions; 2018, p1-52, 52p |
| مصطلحات موضوعية: |
EFFECT of drought on plants, DROUGHTS & the environment, DROUGHT tolerance |
| مستخلص: |
Drought is a major driver of vegetation activity in Spain, with significant impacts on crop yield, forest growth, and the occurrence of forest fires. Nonetheless, the sensitivity of vegetation to drought conditions differs largely amongst vegetation types and climates. We used a high-resolution (1.1km) spatial dataset of the Normalized Difference Vegetation Index (NDVI) for the whole Spain spanning the period from 1981 to 2015, combined with a another newly developed dataset of the Standardized Precipitation Evapotranspiration Index (SPEI) to assess the sensitivity of vegetation types to drought across Spain. In specific, this study explores the drought time scales at which vegetation activity shows its highest response to drought severity at different moments of the year. Results demonstrate that - over large areas of Spain - vegetation activity is controlled largely by the interannual variability of drought. More than 90% of the land areas exhibited statistically significant positive correlations between the NDVI and the SPEI during dry summers (JJA). Nevertheless, there are some considerable spatio-temporal variations, which can be linked to differences in land cover and aridity conditions. In comparison to other climatic regions across Spain, results indicate that vegetation types located in arid regions showed the strongest response to drought. Importantly, this study stresses that the time scale at which drought is assessed is a dominant factor in understanding the different responses of vegetation activity to drought. [ABSTRACT FROM AUTHOR] |
|
Copyright of Natural Hazards & Earth System Sciences Discussions is the property of Copernicus Gesellschaft mbH and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
