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Rollenbeck, R.; Bendix, J. &amp; Fabian, P. (2011): <b>Spatial and temporal dynamics of atmospheric water inputs in tropical mountain forests of South Ecuador. </b>. <i>Hydrological Processes</i> <b>25</b>, 344 - 352.

Resource Description

Title: Spatial and temporal dynamics of atmospheric water inputs in tropical mountain forests of South Ecuador.
FOR816dw ID: 932
Publication Date: 2011-01-01
License and Usage Rights:
Resource Owner(s):
Individual: Ruetger Rollenbeck
Contact:
Individual: Jörg Bendix
Contact:
Individual: Peter Fabian
Contact:
Abstract:
As part of an interdisciplinary research programme, the spatial and temporal variability of precipitation in southern Ecuador<br/> has been investigated since January 2002. The study site is located at the northern margin of the Podocarpus National Park in<br/> the vicinity of Loja, about 500 km south of Quito, at altitudes ranging from 1800 to 3200 m.a.s.l. Due to its low density, the<br/> conventional rainfall station network fails to register the highly variable spatial distribution of rain, whereas contributions by<br/> fog are not accounted at all. Hence, for the first time in a tropical montane forest setting, a weather radar was used, covering a<br/> radius of 60 km and reaching from the Amazon Basin to the coastal plains of the region. Furthermore, a network of sampling<br/> stations supplies data about the altitudinal gradient of fog and rainwater inputs. The precipitation distribution in the study<br/> area proves to be far more variable than previously thought and is strongly coupled to the orographic characteristics and<br/> the special topographical setting of the landscape. Maxima in precipitation occur especially in the eastern parts of the radar<br/> range on slopes exposed to advected moisture from the Amazon Basin, whereas the highest crests of the Andes receive less<br/> precipitation. The study area has two cloud condensation levels, occurring at 1500?2000 and 2500?3500 m.a.s.l., respectively.<br/> At 1800?2000 m.a.s.l., fog is estimated to contribute an additional input of 5% of conventionally measured rainfall, increasing<br/> to about 35% at the highest measurement station (3200 m.a.s.l.). In contrast to some other tropical mountains, there seems to be<br/> no maximum zone of water input, although the gradient remains positive up to the highest altitudes. The unusual precipitation<br/> distribution is thought to reflect the contrasting climatological influences operating in the study area.<br/>
Keywords:
| tropical montane forest | rain | fog | radar |
Literature type specific fields:
ARTICLE
Journal: Hydrological Processes
Volume: 25
Page Range: 344 - 352
Metadata Provider:
Individual: Bernhard Runzheimer
Contact:
Online Distribution:
Download File: http://www.lcrs.de/publications.do?citid=932


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