Evapotranspiration (ET) is a key process linking surface and atmospheric energy budgets, yet its drivers patterns across wetlandscapes are poorly understood worldwide. Here we assess the ET dynamics in 12 wetland complexes South America, revealing major differences under temperate, tropical, equatorial climates. While net radiation dominant driver of seasonality most environments, flooding also contributes strongly to tropical wetlands, especially meeting evaporative demand. Moreover,...

During the last decades, Amazon rainforest underwent uncontrolled exploitation that modified its environmental variables. The current paper analyzes spatiotemporal dynamics of normalized difference vegetation index (NDVI), leaf area (LAI), and surface albedo, temperature in two different covers, preserved deforested areas. We calculated remote-sensing products using Landsat 5 TM images obtained during dry season 1984, 1991, 2000, 2011 central region State Rondônia, Brazil. results showed a...

The Brazilian Midwest has significant spatiotemporal variability in terms of precipitation and air temperature, making it more vulnerable to the occurrence extreme weather events. objective this study is characterize trend climatic events regarding temperature Midwest, analyze their relationship with Pacific Atlantic Sea Surface Temperature anomalies (SSTAs). We used daily data measured at 24 conventional stations. SSTA were obtained from Climate Prediction Center. frequency hot extremes had...

Atmospheric aerosols significantly influence climate systems and hydrological processes, but their impacts on evapotranspiration remain insufficiently understood, particularly in tropical savanna regions. This study investigates the direct indirect effects of aerosol optical depth (AOD) reference (ET0) Mato Grosso Cerrado, Brazil, a biome characterized by pronounced seasonal climatic variations. Using data collected from AERONET network at Fazenda Miranda, AOD was analyzed alongside...

Anthropogenic interference in urban lotic systems is a factor affecting the biota of waterbodies. Aquatic macro invertebrates are an important food source for fish and valuable indicators water quality. The objective this work was to study Chironomus larvae (Chironomidae: Diptera) distribution along environmental gradient Barbado Stream, Cuiabá, MT, Brazil. No individual found springs which may indicate preservation area. During period, we 40.3 94.4 individuals/m2 at points 3 4 (low course),...

Gross primary production (GPP) is the total amount of fixed carbon and depends on vegetation health water energy availability. GPP has been monitored worldwide by flux towers models that are coupled with remotely sensed data, such as Moderate Resolution Imaging Spectroradiometer (MODIS). However, have not evaluated for tropical savanna, which presumably represent a challenge because large spatial seasonal variation in GPP. Thus, our goal was to evaluate Vegetation Photosynthesis Model (VPM),...

Brazilian tropical ecosystems in the state of Mato Grosso have experienced significant land use and cover changes during past few decades due to deforestation wildfire. These can directly affect mass energy exchange near surface and, consequently, evapotranspiration (ET). Characterization seasonal patterns ET help understanding how these function with a changing climate. The goal this study was characterize temporal (seasonal-to-decadal) spatial over using remotely sensed products....

The Cerrado is a heterogeneous landscape which shrinking due to deforestation, giving rise managed ecosystems. land cover changes alter net radiation (Rn), determines the quantity of available energy balance partition. objectives this study were (1) determine spatial pattern vegetation indices, albedo, and surface temperature (LST) (2) evaluate Rn estimated by Landsat 5 Thematic Mapper (TM) images over areas in Upper Paraguay River Basin. We LST, five selected types. values TM had seasonal...

O município de Humaitá, no sul do Estado Amazonas, apresenta uma notável taxa crescimento populacional, o que favorece desmatamento e, consequentemente, afeta regime pluviométrico regional. Estudos sobre precipitação na região amazônica são baseados em dados espacial, mensais ou anuais das chuvas. Então, esse trabalho objetivou estudar a frequência relativa horária e intensidade da Humaitá-AM. Os foram coletados estação meteorológica Instituto Nacional Meteorologia INMET, localizada Federal...

O sul do Amazônas apresenta diversas fisionomias vegetais naturais que estão sendo substituidas pela agropecuária. A variação espacial no balanço de radiação é fortemente relacionada à alterações uso solo. Sendo assim, o objetivo desse trabalho foi avaliar a espaço-temporal saldo sobre diferentes superfícies estado Amazonas por imagens Thematic Mapper (TM) Landsat 5. área estudo município Humaitá-AM, onde possível identificar floresta, campo limpo, sujo e cidade. As foram adquiridas site U....

Semi-deciduous forest in the Amazon Basin is sensitive to temporal variation surface water availability that can limit seasonal rates of leaf and canopy gas exchange. We estimated dynamics gross primary production (GPP) over 3 years (2005–2008) using eddy covariance assessed spectral reflectance MODIS imagery for a mature tropical semi-deciduous located near Sinop, Mato Grosso, Brazil. A light-use efficiency model, known as Vegetation Photosynthesis Model (VPM), was used estimate...

Fires are essential for defining the structure, biodiversity and functioning of Brazilian Cerrado. Several protected areas have been created in Cerrado to conserve natural ecosystems by eliminating, minimizing or reducing human pressures threats operating within their limits. However, impacts these conservation practices on local microclimate change fire coverage poorly known. Thus, aim this study was evaluate impact 2017 megafire Chapada dos Guimarães National Park (CGNP) biophysical...

The Amazon biome plays a crucial role in the hydrological cycle, supplying water vapor for atmosphere and contributing to evapotranspiration (ET) that influences regional humidity across Brazil South America. Remote sensing (RS) has emerged as valuable tool measuring estimating ET, particularly data-scarce region. A scientometric analysis was conducted identify most used RS-based ET product or model its potential application Amazon. Scientometrics allows quantitative of scientific output;...

The gross primary production (GPP) of ecosystems is an important variable in the study global climate change. Generally, GPP has been estimated by micrometeorological techniques. However, these techniques have a high cost implantation and maintenance, making use orbital sensor data option to be evaluated. Thus, objective this was evaluate potential MODIS (Moderate Resolution Imaging Spectroradiometer) MOD17A2 product vegetation photosynthesis model (VPM) predict Amazon-Cerrado transitional...

A região amazônica têm sido foco de discussões e estudo relacionando o uso ocupação das terras com as mudanças climáticas locais. Esse trabalho tem como objetivo avaliar a influência cobertura da terra sobre clima Porto Velho – RO. Utilizou-se séries temporais temperatura do ar média, máxima mínima, umidade relativa precipitação, município Velho, entre 1945 2005. mudança solo foi avaliada através informações geradas pelo Programa Cálculo Desflorestamento Amazônia INPE, 1988 2006 para...

The acceleration of the anthropogenic activity has increased atmospheric carbon concentration, which causes changes in regional climate. Gross Primary Production (GPP) is an important variable global cycle studies, since it defines extraction rate from terrestrial ecosystems. objective this study was to estimate GPP Amazon-Cerrado Transitional Forest by Vegetation Photosynthesis Model (VPM) using local meteorological data and remote sensing MODIS Landsat 5 TM reflectance 2005 2008. estimated...

The establishment of urban fires prevention policies can be defined from studies about its causes. Urban are aggravated by specific weatherconditions, such as lack precipitation, high wind speed and low relative humidity, besides it has been related to human activities. numberof in the city Cuiabá - MT is during dry season, which affect health population. Thus, objective this study was (i)assess seasonality attended Fire Department burnings obtained satellite imagery; (ii) calculate Monte...

ABSTRACT. Cuiab´a is located on the border of Pantanal and Cerrado, in Mato Grosso State, which recognized as one biggest agricultural producers Brazil. The use natural resources a sustainable manner requires knowledge regional meteorological variables. Thus, objective this study was to characterize seasonal interannual pattern variables Cuiab´a. data from 1961 2011 were provided by Instituto Nacional de Meteorologia (INMET – National Institute Meteorology). results have shown variations...

Changes resulting from land use and occupation modify the surface radioactive balance. This paper evaluated impact on net radiation caused by conversion of a Cerrado area in an agricultural zone southern Mato Grosso using Landsat 5 TM sensor imagery acquired between June October 2011. The analyses were performed following classes: Cerrado, riparian vegetation, sugarcane, soybean, pasture, bare soil water. replacement areas changed biophysical indices due to change biomass optical properties...