Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas
The main climatic indices used for the determination of pre-summer drought severity were developed for temperate zones with very different climatic conditions from those found in the tropical climate zones, particularly with respect to seasonal rainfall variations. The temporal evolution of pre-summ...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-11-01
|
| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/11/11/1209 |
| _version_ | 1827702629959991296 |
|---|---|
| author | David Romero Eric Alfaro Roger Orellana Maria-Engracia Hernandez Cerda |
| author_facet | David Romero Eric Alfaro Roger Orellana Maria-Engracia Hernandez Cerda |
| author_sort | David Romero |
| collection | DOAJ |
| description | The main climatic indices used for the determination of pre-summer drought severity were developed for temperate zones with very different climatic conditions from those found in the tropical climate zones, particularly with respect to seasonal rainfall variations. The temporal evolution of pre-summer drought leads the authors to compute the indices for each year over a defined period according to the climatic normals of each meteorological station and to consider the months inside the dry episode differently, according to the law of emptying the water reserves. As a function of this, standardized drought indices are proposed for the evaluation of the pre-summer drought in tropical zone. Two new indices were tested: one developed from precipitation and the other also considering temperature. These indices were validated by correlation with Advanced very-high-resolution radiometer (AVHRR) normalized difference vegetation index (NDVI) time series and used to identify the most severe drought conditions in the Yucatan Peninsula. The comparison between the indices and their temporal variations highlighted the importance of temperature in the most critical events and left indications of the impact of global warming on the phenomenon. |
| first_indexed | 2024-03-10T14:59:57Z |
| format | Article |
| id | doaj.art-8f1ae9d5fc0f49aaaddf74ff6d062a46 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-10T14:59:57Z |
| publishDate | 2020-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-8f1ae9d5fc0f49aaaddf74ff6d062a462023-11-20T20:14:34ZengMDPI AGAtmosphere2073-44332020-11-011111120910.3390/atmos11111209Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical AreasDavid Romero0Eric Alfaro1Roger Orellana2Maria-Engracia Hernandez Cerda3Escuela Nacional de Estudios Superiores, Unidad Mérida, Universidad Nacional Autónoma de México, Ucu 97357, MexicoEscuela de Física, Centro de Investigaciones Geofísicas y Centro de Investigación en Ciencias del Mar y Limnología, Ciudad Universitaria Rodrigo Facio, Universidad de Costa Rica, San Jose 11501-2060, Costa RicaCentro de Investigación Científica de Yucatán, Merida 97205, MexicoInstituto de Geografía, Universidad Nacional Autónoma de México, Mexico City 04510, MexicoThe main climatic indices used for the determination of pre-summer drought severity were developed for temperate zones with very different climatic conditions from those found in the tropical climate zones, particularly with respect to seasonal rainfall variations. The temporal evolution of pre-summer drought leads the authors to compute the indices for each year over a defined period according to the climatic normals of each meteorological station and to consider the months inside the dry episode differently, according to the law of emptying the water reserves. As a function of this, standardized drought indices are proposed for the evaluation of the pre-summer drought in tropical zone. Two new indices were tested: one developed from precipitation and the other also considering temperature. These indices were validated by correlation with Advanced very-high-resolution radiometer (AVHRR) normalized difference vegetation index (NDVI) time series and used to identify the most severe drought conditions in the Yucatan Peninsula. The comparison between the indices and their temporal variations highlighted the importance of temperature in the most critical events and left indications of the impact of global warming on the phenomenon.https://www.mdpi.com/2073-4433/11/11/1209droughttropical climateprecipitationtemperatureMeso America |
| spellingShingle | David Romero Eric Alfaro Roger Orellana Maria-Engracia Hernandez Cerda Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas Atmosphere drought tropical climate precipitation temperature Meso America |
| title | Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas |
| title_full | Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas |
| title_fullStr | Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas |
| title_full_unstemmed | Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas |
| title_short | Standardized Drought Indices for Pre-Summer Drought Assessment in Tropical Areas |
| title_sort | standardized drought indices for pre summer drought assessment in tropical areas |
| topic | drought tropical climate precipitation temperature Meso America |
| url | https://www.mdpi.com/2073-4433/11/11/1209 |
| work_keys_str_mv | AT davidromero standardizeddroughtindicesforpresummerdroughtassessmentintropicalareas AT ericalfaro standardizeddroughtindicesforpresummerdroughtassessmentintropicalareas AT rogerorellana standardizeddroughtindicesforpresummerdroughtassessmentintropicalareas AT mariaengraciahernandezcerda standardizeddroughtindicesforpresummerdroughtassessmentintropicalareas |