Results 71 to 80 of about 457,814 (191)

Carbonaceous Aerosols in Fine Particulate Matter of Santiago Metropolitan Area, Chile

The Scientific World Journal, 2014
Measurements of carbonaceous aerosols in South American cities are limited, and most existing data are of short term and limited to only a few locations.
Richard Toro Araya, Robert Flocchini, Rául G. E. Morales Segura, Manuel A. Leiva Guzmán   +3 more
doaj   +1 more source

Concentrations and ratios of particulate organic carbon, nitrogen, and phosphorus in the global ocean

Scientific Data, 2014
Knowledge of concentrations and elemental ratios of suspended particles are important for understanding many biogeochemical processes in the ocean. These include patterns of phytoplankton nutrient limitation as well as linkages between the cycles of ...
A. Martiny, J. Vrugt, M. Lomas
semanticscholar   +1 more source

Dominant Edaphic Controls on Particulate Organic Carbon in Global Soils [PDF]

Global Change Biology
ABSTRACTThe current soil carbon paradigm puts particulate organic carbon (POC) as one of the major components of soil organic carbon worldwide, highlighting its pivotal role in carbon mitigation. In this study, we compiled a global dataset of 3418 data points of POC concentration in soils and applied empirical modeling and machine learning algorithms ...
Ziyu Guo, Jianzhao Liu, Liyuan He, Jorge L. Mazza Rodrigues, Ning Chen, Yunjiang Zuo, Nannan Wang, Xinhao Zhu, Ying Sun, Lihua Zhang, Yanyu Song, Dengjun Zhang, Fenghui Yuan, Changchun Song, Xiaofeng Xu   +14 more
openaire   +2 more sources

Attenuation of particulate organic carbon flux in the Scotia Sea, Southern Ocean, is controlled by zooplankton fecal pellets

, 2015
The Southern Ocean (SO) is an important CO2 reservoir, some of which enters via the production, sinking, and remineralization of organic matter. Recent work suggests that the fraction of production that sinks is inversely related to production in the SO,
E. Cavan, F. L. Moigne, A. Poulton, G. A. Tarling, P. Ward, C. Daniels, G. Fragoso, R. Sanders   +7 more
semanticscholar   +1 more source

Soil Organic Matter Dynamics in the Ericaceous and Afroalpine Belts of the Bale Mountains, Ethiopia: Influence of Vegetation, Fire, and Topographic Factors

Soil Systems
Soil organic matter (SOM) dynamics in tropical montane ecosystems remain poorly understood, particularly regarding the relative importance of particulate versus mineral-associated fractions under varying disturbance regimes.
Zerihun Asrat, Mekbib Fekadu, Zerihun Woldu, Sebsebe Demissew, Betelhem Mekonnen, Lars Opgenoorth, Georg Miehe, Wolfgang Zech   +7 more
doaj   +1 more source

Where is mineral ballast important for surface export of particulate organic carbon in the ocean?

Geophysical Research Letters, 2014
Correlations between particulate organic carbon (POC) and mineral fluxes in the deep ocean have inspired the inclusion of “ballast effect” parameterizations in carbon cycle models. A recent study demonstrated regional variability in the effect of ballast
F. L. Le Moigne, K. Pabortsava, C. Marcinko, Patrick C. Martin, R. Sanders   +4 more
semanticscholar   +1 more source

Soil depth distribution of particulate organic carbon and nitrogen in the southeastern United States

Agricultural & Environmental Letters
Particulate organic matter may be an important component feeding soil microbial activity. This study described population‐level statistics of particulate organic carbon (C) and nitrogen (N) in predominately Ultisols across 181 farms throughout North ...
Alan J. Franzluebbers
doaj   +1 more source

Dynamics of particulate organic carbon flux in a global ocean model

, 2014
The sinking of particulate organic carbon (POC) is a key component of the ocean carbon cycle and plays an important role in the global climate system.
I. Lima, P. Lam, S. Doney
semanticscholar   +1 more source

Chlorophyll a, Particulate Organic Carbon and Particulate Organic Nitrogen in Sessile Algal Communities of Nepalese Mountain Rivers

Japanese Journal of Limnology (Rikusuigaku Zasshi), 1982
Amounts of chlorophyll a, particulate organic carbon and nitrogen of sessile algal communities in Nepalese mountain rivers were estimated. Samplings were performed at 34 points in the three main river systems of the east, middle and west Nepal from December 1978 to June 1979. Chlorophyll a amounts ranged from 1.3-189.6 mg·m-2 (average, 18.6). The ratio
TERASHIMA, Akira, NAKANISHI, Masami
openaire   +2 more sources

SOIL AGGREGATE FRACTIONS AND ORGANIC CARBON POOLS AS INFLUENCED BY TREE DIVERSITY IN FOREST RESERVE OF SEMI ARID NIGERIA

Tropical and Subtropical Agroecosystems, 2013
The ability of trees to sequester carbon vary from species to species, this study therefore evaluates the influence of seven tree species (Acacia senegal, Azadirachta indica, Eucalyptus camadulensis, Khaya senegalensis, Prosopis africana, Tamarindus ...
Halima Mohammed Lawal
doaj