Sensitivity of DaisyGIS to LAI : implications for land use based modelling of nitrate leaching
Etablissement de la sensibilité du SIG Daisy aux changements de l'indice de surface de feuille (Leaf Area Index) et discussion des implications pour la modélisation de l'utilisation des sols du lessivage des nitrates en utilisant la télédétection
The method for simulating the temporal and spatial distribution patterns of leaf area index (LAI) and biomass at landscape scale using remote sensing images and surface data is discussed in this paper. The method is based on Landsat Thematic Mapper
(TM) images (May 23, 1985; September 2, 1999) and LAI and biomass measurements at patch scale. The study area is Changbai Mountain Nature Reserve in southeastern Jilin province.
Der Tayrona-Trockenwald Nord-Kolumbiens. Eine Okosystemstudie unter besonderer Berücksichtigung von Biomasse und Blattflächenindex (LAI). (La forêt tropicale sèche de Tayrona en Colombie du Nord. Une étude d'écosystème compte tenu en particulier de
la biomasse et de l'indice de surface des feuilles)
Biomasse ; Colombie ; Dynamique de la végétation ; Ecologie ; Ecologie végétale ; Ecosystème ; Forêt ; Forêt tropicale ; Géographie physique ; Indice de surface des feuilles ; Végétation ; Zone intertropicale
The drought deciduous lowland forest of the Caribbean coast near Santa Marta (Columbia) has been investigated for biomass, leaf area index (LAI), and foliage dynamics at three different stands. The physiognomical differences depending
on the different ecological factors are reflected within all measured paramenters. Living wood biomass as well as the mean actual LAI could be taken into account as best indicators of stand quality.
This paper investigates the feasibility of using Landsat TM data to retrieve leaf area index (LAI). To get a LAI retrieval model based ground reflectance and vegetation index, detailed field data were collected in the study area of eastern China
, dominated by bamboo, tea plant and greengage. The AA. discuss the sensitivity of parameters in the LAI retrieval model, and retrieve a suitable LAI model for the sub-tropical vegetation based on Landsat TM data, and validate the model with ground-based LAI
Latent and sensible energy flux over deforested land surfaces in the Eastern Amazon and Northern Thailand
Mesures sur des sites à Igarapé-Açu (Brésil) et à Pang Khum (Thailande) des processus météorologiques, de la résistance des stomates et du Leaf Area Index (LAI) sur diverses surfaces déboisées. A partir de ces mesures, on estime l'impact du
This paper presents new information on the age and environment of deposition of the Trego Hot Springs (THS) and Wono layers that indicate the surface of Pyramid Lake lay well below the Sqaw Creek site when the Trego tephra layer was deposited
. The studies indicate that the surface elevation of Pyramid Lake was at or below its spill point to Winnemucca Lake subbasin (1177 m) when the THS layer was deposited and was at its spill point to the Smoke Creek-Black Rock Desert subbasin (1207 m) when
Concept ; Earth surface processes ; Geology ; Georgia (USA) ; Gully erosion ; Human impact ; Nineteenth Century ; Rill wash ; Soil erosion ; United States of America
at Milledgeville, Georgia, in January 1846. He explicitely related its ultimate cause to the laying bare of the clayey surface horizons as a result of recent forest clearance and its proximate formation to sunbaked cracks in the clay and erosion by rainfall-induced
It was opened the following: the salt deposition (mirabilite) within the western deep depression, sea deposits carbonate clays underlaid by continental ones (quartz sands), much more wide distribution of deltaic deposits as compared with surface
layer and reduction of sea deposits, the availability of 2 to 36 sm intermediate layer enriched by plant organic laying among bottom deposits of the southern aquatic area at a depth of 40 to 140 sm. (Ed.).
Spatial and temporal variation of global LAI during 1981-2006
In this paper, the AA. use a long-term leaf area index data (LAI) to identify where changes happened and where has experienced the strongest change around the globe during 1981–2006. Results show that, over the past 26 years, LAI has generally
increased at a rate of 0.0013 per year around the globe. LAI has prominently increased in Europe, Siberia, Indian Peninsula, America and south Canada, South region of Sahara, southwest corner of Australia and Kgalagadi Basin; while noticeably decreased
in Southeast Asia, southeastern China, central Africa, central and southern South America and arctic areas in North America. The geographic distribution of global LAI trend over the 26 years is mapped, and the hot-spot areas with extreme trends are identified.
Human geographies of climate change : landscape, temporality, and lay knowledges
The AA. bring together work on landscape, temporality and lay knowledges to propose new ways of understanding climate change. A focus on the familiar landscapes of everyday life offers an opportunity to examine how climate change could be researched
Forderung des Umweltbewusstseins durch die Gestaltung eines Freizeit-und Erholungsparkes in einer sozialistischen Stadt. (Promoting environment-mindedness by laying out a recreation park in a socialist city)
Optimum organization of the environment is a extremly complex group of tasks to be dealt with by architects and town planners. It was necessary to take into account the opinions and ideas of the resident in the process of laying out an adequate
Leaf area index (LAI) of natural vegetation is recognized as the most important variable for measuring vegetation structure over large areas, and for relating it to energy and mass exchange. In this paper, according to the statistical analysis based
on a lot of forest plots, the mathematical models of LAI distribution patterns in the hydro-thermal spaces for 5 coniferous forest types in China were established.
Using a case study of recreational angling, the A. shows how fish in English rivers and lakes are counted and anglers act as lay or amateur knowledge-producers in the state's metrological knowledge-practices. She shows how, to support environmental
measurement, the state manages not only the environment and fish, but also anglers as lay knowledge-producers, using both regulation and economic incentives.