نتایج جستجو برای: drying and rewetting

تعداد نتایج: 16831943  

Journal: :Water 2021

As a result of global climate change, heavy rainfall events and dry periods are increasingly occurring in Germany, with consequences for the water solute balance soils to be expected. The effects change on nitrogen carbon leaching were investigated using 21 non-weighable manually filled lysimeters UFZ lysimeter facility Falkenberg, which have been managed since 1991 according principles best ma...

Journal: :Journal Of Geophysical Research: Biogeosciences 2021

The radiocarbon signature of respired CO2 (∆14C-CO2) measured in laboratory soil incubations integrates contributions from carbon pools with a wide range ages, making it powerful model constraint. Incubating archived soils enriched by “bomb-C” mid-20th century nuclear weapons testing would be even more as enable us to trace this pulse over time. However, air-drying and subsequent rewetting soil...

Journal: :PloS one 2016
Willem-Jan Emsens Camiel J S Aggenbach Ken Schoutens Alfons J P Smolders Dominik Zak Rudy van Diggelen

Rewetted, previously drained fens often remain sources rather than sinks for carbon and nutrients. To date, it is poorly understood which soil characteristics stimulate carbon and nutrient mobilization upon rewetting. Here, we assess the hypothesis that a large pool of iron in the soil negatively affects fen restoration success, as flooding-induced iron reduction (Fe3+ to Fe2+) causes a disprop...

2005
Kerri L. Steenwerth Louise E. Jackson Francisco J. Calderón Kate M. Scow Dennis E. Rolston

Rainfall in Mediterranean climates may affect soil microbial processes and communities differently in agricultural vs. grassland soils. We explored the hypothesis that land use intensification decreases the resistance of microbial community composition and activity to perturbation. Soil carbon (C) and nitrogen (N) dynamics and microbial responses to a simulated Spring rainfall were measured in ...

Journal: :Oikos 2021

Predicting the impacts of global change on highly dynamic ecosystems requires a better understanding how communities respond to disturbance duration, frequency and timing. Intermittent rivers ephemeral streams are that recognized as most common fluvial ecosystem globally. The complexity drying process can give rise different annual antecedent hydrological conditions, but their effect aquatic re...

2015
Navdeep Singh Dhillon Jacopo Buongiorno Kripa K Varanasi

Enhancing the critical heat flux (CHF) of industrial boilers by surface texturing can lead to substantial energy savings and global reduction in greenhouse gas emissions, but fundamentally this phenomenon is not well understood. Prior studies on boiling crisis indicate that CHF monotonically increases with increasing texture density. Here we report on the existence of maxima in CHF enhancement ...

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