Results 71 to 80 of about 237,106 (303)

Perturbations in the carbon budget of the tropics [PDF]

open access: yes, 2014
The carbon budget of the tropics has been perturbed as a result of human influences. Here, we attempt to construct a ‘bottom-up’ analysis of the biological components of the budget as they are affected by human activities.
Achard   +203 more
core   +1 more source

Engineering Porous Hollow Metal‐Poly(Heptazine Imide) Spheres: An Optimized Synthetic Strategy for Controlling Surface, Morphology, and Properties

open access: yesAdvanced Functional Materials, EarlyView.
Hollow poly(heptazine imide) spheres are prepared through a novel approach that integrates hard templating with ionothermal synthesis. This method enables precise control over surface area, pore volume, hydrophilicity, light absorption, band position, and metal composition. These tunable properties facilitate the customized design of semiconductors for
Lingli Ni   +10 more
wiley   +1 more source

Proximate controls on semiarid soil greenhouse gas fluxes across 3 million years of soil development [PDF]

open access: yes, 2015
Soils are important sources and sinks of three greenhouse gases (GHGs): carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). However, it is unknown whether semiarid landscapes are important contributors to global fluxes of these gases, partly ...
Hart, SC   +3 more
core   +1 more source

Evapotranspiration and water use efficiency in relation to climate and canopy nitrogen in U.S. forests [PDF]

open access: yes, 2016
Understanding relations among forest carbon (C) uptake and water use is critical for predicting forest-climate interactions. Although the basic properties of tree-water relations have long been known, our understanding of broader-scale patterns is ...
Anav   +119 more
core   +3 more sources

Non Thermal‐Driven Photocatalytic Ammonia Decomposition at Near‐Room Temperature on a Plasmonic Nanocone Array

open access: yesAdvanced Functional Materials, EarlyView.
Plasmonic photocatalytic ammonia decomposition occurs at near‐room temperature on a plasmonic Au nanocone array under visible light illumination. The nanostructure efficiently harnesses plasmonic modes, leading to increased reaction rates upon plasmon decay.
Thanh‐Lam Bui   +17 more
wiley   +1 more source

Gross primary production variations dominate the response of Indian terrestrial carbon fluxes to global climatic phenomena

open access: yesCommunications Earth & Environment
A better understanding of country-scale anthropogenic carbon dioxide emissions and natural flux estimates and the carbon-climate feedback, is critical in formulating national climate policies to attain net zero emissions.
Emili Singha Roy   +12 more
doaj   +1 more source

Nonparametric Model Prediction for Intelligent Regulation of Human Cardiorespiratory System to Prescribed Exercise Medicine

open access: yesIEEE Access, 2020
Intelligent regulation for human exercise behaviors becomes significantly necessary for exercise medicine after the COVID-19 epidemic. The key issue of exercise regulation and its potential development for intelligent exercise is to describe human ...
Hairong Yu   +8 more
doaj   +1 more source

The Influence of Annealing on the Sb Layer in the Synthesis of [001]‐Oriented Sb2Se3 Film for Photoelectrochemical Hydrogen Gas Generation

open access: yesAdvanced Functional Materials, EarlyView.
[001]‐oriented Sb2Se3 film with improved crystallinity and adjusted composition is achieved via a new thermal treatment approach consisting of preliminary annealing of the Sb layer before its selenization. The findings of this work demonstrate enhanced charge carriers' transportation, a stable performance, and an improvement of H2 generation from ...
Magno B. Costa   +7 more
wiley   +1 more source

Equilibrium responses of global net primary production and carbon storage to doubled atmospheric carbon dioxide: sensitivity to changes in vegetation nitrogen concentration [PDF]

open access: yes, 1997
We ran the terrestrial ecosystem model (TEM) for the globe at 0.5° resolution for atmospheric CO2 concentrations of 340 and 680 parts per million by volume (ppmv) to evaluate global and regional responses of net primary production (NPP) and carbon ...
A. David McGuire   +97 more
core   +2 more sources

Atmospheric carbon dioxide uptake by mangrove trees

open access: yesMangrove Watch
Background:. This study was written in the aim of knowing how to calculate the carbon uptake by mangrove using steps that had been done by previous study, also knowing which type of mangrove that absorbs most of the carbon. Methods: This paper is compiled by collecting related data from various library sources, such as online articles and other ...
Shanty Isnani, Yunita Ismail Masjud
openaire   +1 more source

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