Results 81 to 90 of about 39,409 (173)

First assessment of the plant phenology index (PPI) for estimating gross primary productivity in African semi-arid ecosystems

open access: yes, 2019
The importance of semi-arid ecosystems in the global carbon cycle as sinks for CO2 emissions has recently been highlighted. Africa is a carbon sink and nearly half its area comprises arid and semi-arid ecosystems.
Abdi, A. M.   +6 more
core   +1 more source

Increasingly Important Role of Atmospheric Aridity on Tibetan Alpine Grasslands

open access: yesGeophysical Research Letters, 2018
Pronounced warming occurring on the Tibetan Plateau is expected to stimulate alpine grassland growth but could also increase atmospheric aridity that limits photosynthesis.
Jinzhi Ding   +8 more
doaj   +1 more source

Jatropha curcasand Ricinus communisdisplay contrasting photosynthetic mechanisms in response to environmental conditions

open access: yesScientia Agricola, 2015
Higher plants display different adaptive strategies in photosynthesis to cope with abiotic stress. In this study, photosynthetic mechanisms and water relationships displayed byJatropha curcasL. (physic nuts) andRicinus communisL.
Milton Costa Lima Neto   +3 more
doaj   +1 more source

SIMULATING OZONE EFFECTS ON FOREST PRODUCTIVITY: INTERACTIONS AMONG LEAF‐, CANOPY‐, AND STAND‐LEVEL PROCESSES [PDF]

open access: yes, 1997
Ozone pollution in the lower atmosphere is known to have adverse effects on forest vegetation, but the degree to which mature forests are impacted has been very difficult to assess directly.
Aber, John D.   +2 more
core   +2 more sources

Weakened Increase in Global Near‐Surface Water Vapor Pressure During the Last 20 Years

open access: yesGeophysical Research Letters
It is well known that global warming increases the atmospheric water vapor content, which results in substantial changes in the hydrological cycle. Using five observational data sets, the results show that an increasing trend of near‐surface water vapor ...
Wenfang Xu   +6 more
doaj   +1 more source

Application of infrared thermography to assess cassava physiology under water deficit condition

open access: yesPlant Production Science, 2018
Water deficit stress is a major factor that inhibits the overall growth and development in cassava (Manihot esculenta), leading to decreased storage root yield.
Piyanan Pipatsitee   +6 more
doaj   +1 more source

Energy Constraints for Climate Models from Hydrologic Partitioning

open access: yes, 2019
It is well known that evaporative cooling of Earth's surface water reduces the amount of radiation that goes into sensible heat, namely the portion of radiation that produces higher temperatures.
Calabrese, Salvatore   +3 more
core   +1 more source

A past and present perspective on the European summer vapor pressure deficit [PDF]

open access: yesClimate of the Past
The response of evapotranspiration to anthropogenic warming is of critical importance for the water and carbon cycle. Contradictory conclusions about evapotranspiration changes are caused primarily by their brevity in time and sparsity in space, as well ...
V. Nagavciuc   +12 more
doaj   +1 more source

Simulating soybean canopy temperature as affected by weather variables and soil water potential [PDF]

open access: yes
Hourly weather data for several clear sky days during summer at Phoenix and Baltimore which covered a wide range of variables were used with a plant atmosphere model to simulate soybean (Glycine max L.) leaf water potential, stomatal resistance and ...
Choudhury, B. J.
core   +1 more source

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