Spatial patterns and recent trends in cloud fraction and cloud‐related diffuse radiation in Amazonia

  title={Spatial patterns and recent trends in cloud fraction and cloud‐related diffuse radiation in Amazonia},
  author={Nathalie Butt and Mark G. New and Gil Lizcano and Yadvinder S. Malhi},
  journal={Journal of Geophysical Research},
  • N. Butt, M. New, +1 author Y. Malhi
  • Published 16 November 2009
  • Environmental Science
  • Journal of Geophysical Research
declined at a rate of 0.3% yr � 1 , and the wet season decline was 0.1% yr � 1 . In the west of the region a 1% increase in CRDRP is indicated. Changes in forest composition and productivity may be linked to changes in CRDRP in that decreases in cloud cover in sunny regions or dry seasons may cause a decline in productivity, whereas declines in cloud cover in cloudy regions, or during cloudy seasons, may cause an increase in productivity. 

Figures and Tables from this paper

Reduced Wet-Season Length Detected by Satellite Retrievals of Cloudiness over Brazilian Amazonia: A New Methodology
This study investigates the variability of the seasonal cycle of convection in the Brazilian Amazon basin during the last decades, and examines physical mechanisms that potentially trigger theseExpand
Cloud frequency climatology at the Andes/Amazon transition: 2. Trends and variability
[1] The climate and ecology of tropical montane systems is intimately connected with the complex spatial dynamics of cloud occurrence, but there have been few studies of the patterns and trends ofExpand
Changes in South American hydroclimate under projected Amazonian deforestation
The WRF model with improved representation of groundwater dynamics and added feature of Amazonian moisture tracers shows that deforestation leads to changes that are seasonally very different, and Contrary to expectations, the moisture tracer in WRF show no evidence that precipitation decreases are due to recycling or changes in stability. Expand
The change of cloud top height over East Asia during 2000–2018
Abstract In order to know how regional averaged cloud top height (CTH) responded to the past climatic change, the spatial and temporal variations of CTH based on MODIS data (MOD03_08_v6.0) from MarchExpand
Droughts Over Amazonia in 2005, 2010, and 2015: A Cloud Cover Perspective
Amazon forests experienced recent severe droughts in an anomalous short period induced by different mechanisms and had different length periods and spatial patterns. Droughts of 2005 and 2010 wereExpand
Recent Observed Climate Change Over Oman
This study examined trends in temperature and precipitation parameters for the Sultanate of Oman in the period between 1980 and 2013. The data set has been carefully checked for the quality controlExpand
Analysis of spatiotemporal variations of cloud fraction based on geographic characteristics over Iran
The goal of the present study is to provide a climatic description of spatiotemporal variations of cloud fractions based on geographic characteristics over Iran during daytimes. Analyses areExpand
Identifying sky conditions in Iran from MODIS Terra and Aqua cloud products
Clouds can influence climate through many complex interactions within the hydrological cycle. Due to the important effects of cloud cover on climate, it is essential to study its variability overExpand
Shifting dynamics of climate-functional groups in old-growth Amazonian forests
Background: Climate change is driving ecosystem shifts, which has implications for tropical forest system function and productivity. Aim: To investigate Amazon forest dynamics and test forExpand
Recent observed climate change over the Arabian Peninsula
[1] We have examined trends in temperature and precipitation parameters for the Arabian Peninsula (AP) during the last 2 to 3 decades. The data set has been carefully quality controlled and checkedExpand


Cloud cover limits net CO2 uptake and growth of a rainforest tree during tropical rainy seasons
Light, rather than water, temperature, or leaf nitrogen, was the primary factor limiting CO2 uptake during the rainy season, and photosynthesis, vegetative growth, and reproduction increased significantly. Expand
Climate-Driven Increases in Global Terrestrial Net Primary Production from 1982 to 1999
It is indicated that global changes in climate have eased several critical climatic constraints to plant growth, such that net primary production increased 6% (3.4 petagrams of carbon over 18 years) globally. Expand
Spatial patterns and recent trends in the climate of tropical rainforest regions.
  • Y. Malhi, James Wright
  • Geography, Medicine
  • Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 2004
An analysis of the mean climate and climatic trends of tropical rainforest regions over the period 1960-1998, with the aid of explicit maps of forest cover and climatological databases, finds the El Niño-Southern Oscillation is the primary driver of temperature variations across the tropics and of precipitation fluctuations for large areas of the Americas and southeast Asia. Expand
Arguments against a physical long‐term trend in global ISCCP cloud amounts
[1] The International Satellite Cloud Climatology Project (ISCCP) multi-decadal record of cloudiness exhibits a well-known global decrease in cloud amounts. This downward trend has recently been usedExpand
A Survey of Changes in Cloud Cover and Cloud Types over Land from Surface Observations, 1971–96
From a dataset of weather observations from land stations worldwide, about 5400 stations were selected as having long periods of record with cloud-type information; they cover all continents and manyExpand
Photosynthetic and Water Use Efficiency Responses to Diffuse Radiation by an Aspen-Dominated Northern Hardwood Forest
Clouds can exert strong effects on ecosystem CO2 and water vapor fluxes and may be important determinants of terrestrial primary production. We used three years of eddy-covariance and meteorologicalExpand
The effects of biomass burning aerosols and clouds on the CO2 flux in Amazonia
Aerosol particles associated with biomass burning emissions affect the surface radiative budget and net ecosystem exchange (NEE) over large areas in Amazonia during the dry season. We analysed CO2Expand
Smoke Invigoration Versus Inhibition of Clouds over the Amazon
Focusing on the Amazon, it is shown how a feedback between the optical properties of aerosols and the cloud fraction can modify the aerosol forcing, changing the total radiative energy and redistributing it over the atmospheric column. Expand
Assessing Evidence for a Pervasive Alteration in Tropical Tree Communities
The results do not support the hypothesis that fast-growing species are consistently increasing in dominance in tropical tree communities, and suggest that plots may be simultaneously recovering from past disturbances and affected by changes in resource availability. Expand
Smoke and Pollution Aerosol Effect on Cloud Cover
Using solar measurements from Aerosol Robotic Network sites around the globe, a increase in cloud cover with an increase in the aerosol column concentration and an inverse dependence on the aerosols absorption of sunlight is shown. Expand