Tenelanda, P.; Turini, N.; Orellana-Alvear, J.; Maldonado, B.D.; Bendix, J. & Celleri, R. (2025): <b>The diurnal cycle and event-scale precipitation characteristics in Galápagos at different altitudes during ENSO 2022-2024</b>. <i>ERDKUNDE</i> <b>79</b>, 43-65.
Resource Description
Title:
The diurnal cycle and event-scale precipitation characteristics in Galápagos at different altitudes during ENSO 2022-2024
FOR816dw ID:
577
Publication Date:
2025-05-08
License and Usage Rights:
Resource Owner(s):
Individual:
Pablo Tenelanda
Contact:
email:
webmaster <at> lcrs.de
Individual:
Nazli Turini
Contact:
email:
turini <at> staff.Uni-Marburg.DE
Germany
Individual:
Johanna Orellana-Alvear
Contact:
email:
webmaster <at> lcrs.de
Individual:
Byron Delgado Maldonado
Contact:
email:
webmaster <at> lcrs.de
Individual:
Joerg Bendix
Contact:
email:
webmaster <at> lcrs.de
Individual:
Rolando Celleri
Contact:
email:
webmaster <at> lcrs.de
Abstract:
An understanding of sub-hourly precipitation variability in the Galapagos Islands is crucial for water resource <br/>
management and effective biodiversity conservation. This study compares the diurnal cycle and event-scale precipitation <br/>
characteristics (ESPC), such as mean and maximum intensity, duration and rainfall accumulation at different altitudes during <br/>
El Niño-Southern Oscillation (ENSO) 2022-2024 on Santa Cruz Island. The La Niña phase was analyzed from April 2022 <br/>
to January 2023 and the El Niño phase from June 2023 to April 2024. Precipitation data, recorded every 10 minutes, was <br/>
collected from a recently established network of automatic weather stations, which were strategically positioned at three <br/>
windward and two leeward sites. The results suggest that the diurnal cycle was influenced by altitude, with a maximum vari<br/>
ability between morning and afternoon, regardless of ENSO phase. During La Niña, ESPC exhibited similarities at interme<br/>
diate altitudes at both windward and leeward sides. However, rainfall events at the island’s summit were less intense and of <br/>
longer duration. During El Niño, the highest intensities were observed along the coast and at intermediate altitudes of both <br/>
windward and leeward locations. In contrast, at the top of the island, rainfall events were less intense and more prolonged. <br/>
At all altitudes, more than half of the rainfall events corresponded to garúa events, and at the top of the island, almost all <br/>
events were of this type. At this altitude, the contribution of garúa events to the total rainfall accumulation was 80% and <br/>
85% for La Niña and El Niño, respectively. This study provides a detailed analysis of how sub-hourly precipitation varies <br/>
significantly at different altitudes on the windward and leeward sides as a function of ENSO phases, providing valuable <br/>
baseline information for future studies in this unique and fragile ecosystem.
Keywords:
| Galapagos Archipelago | Rainfall | ESNO |
Literature type specific fields:
ARTICLE
Journal:
ERDKUNDE
Volume:
79
Page Range:
43-65
Metadata Provider:
Individual:
Jörg Bendix
Contact:
email:
bendix <at> staff.uni-marburg.de
Deutschhausstraße 12
Room No. 02 A 48
35032 Marburg
Faculty of Geography
Germany
