Biogeosciences
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Modelling post-fire vegetation recovery in PortugalAbstract. Wildfires in Mediterranean Europe have been increasing in number and extension over the last decades and constitute one of the major disturbances of these ecosystems. Portugal is the country with more burnt area in the last decade and the years of 2003 and 2005 were particularly devastating, the total burned areas of 425 000 and 338 000 ha being several times higher than the corr... ...
Biogeosciences - Tập 8 Số 12 - Trang 3593-3607
Processes of ammonia air–surface exchange in a fertilized <i>Zea mays</i> canopyAbstract. Recent incorporation of coupled soil biogeochemical and bi-directional NH3 air–surface exchange algorithms into regional air quality models holds promise for further reducing uncertainty in estimates of NH3 emissions from fertilized soils. While this represents a significant advancement over previous approaches, the evaluation and improvement of such modeling systems for fertiliz... ...
Biogeosciences - Tập 10 Số 2 - Trang 981-998
Technical Note: Large overestimation of <i>p</i>CO<sub>2</sub> calculated from pH and alkalinity in acidic, organic-rich freshwatersAbstract. Inland waters have been recognized as a significant source of carbon dioxide (CO2) to the atmosphere at the global scale. Fluxes of CO2 between aquatic systems and the atmosphere are calculated from the gas transfer velocity and the water–air gradient of the partial pressure of CO2 (pCO2). Currently, direct measurements of water pCO2 remain scarce in freshwaters, and most publish... ...
Biogeosciences - Tập 12 Số 1 - Trang 67-78
Nitrogen isotopes in bulk marine sediment: linking seafloor observations with subseafloor recordsAbstract. The stable isotopes of nitrogen offer a unique perspective on changes in the nitrogen cycle, past and present. However, the presence of multiple forms of nitrogen in marine sediments can complicate the interpretation of bulk nitrogen isotope measurements. Although the large-scale global patterns of seafloor δ15N have been shown to match process-based expectations, small-scale het... ...
Biogeosciences - Tập 10 Số 1 - Trang 101-118
Current and future CO2 emissions from drained peatlands in Southeast Asia
Biogeosciences - Tập 7 Số 5 - Trang 1505-1514 - 2010
Are seamounts refuge areas for fauna from polymetallic nodule fields?Abstract. Seamounts are abundant and prominent features on the deep-sea floor and
intersperse with the nodule fields of the Clarion-Clipperton Fracture Zone
(CCZ). There is a particular interest in characterising the fauna inhabiting
seamounts in the CCZ because they are the only other ecosystem in the region
to provide hard substrata besides the abundant nodules on the soft-sediment
abyss... ...
Biogeosciences - Tập 17 Số 9 - Trang 2657-2680
Evidence for vivianite formation and its contribution to long-term phosphorus retention in a recent lake sediment: a novel analytical approachAbstract. Vivianite, Fe3(PO4)2 · 8 H2O, is a ferrous iron phosphate mineral which forms in waterlogged soils and sediments. The phosphorus (P) bound in its crystal lattice is considered to be immobilised because vivianite is stable under anoxic, reducing, sedimentary conditions. Thus, vivianite formation can make a major contribution to P retention during early diagenesis. Much remains unk... ...
Biogeosciences - Tập 11 Số 18 - Trang 5169-5180
A strong CO<sub>2</sub> sink enhanced by eutrophication in a tropical coastal embayment (Guanabara Bay, Rio de Janeiro, Brazil)Abstract. In contrast to its small surface area, the coastal zone plays a disproportionate role in the global carbon cycle. Carbon production, transformation, emission and burial rates at the land–ocean interface are significant at the global scale but still poorly known, especially in tropical regions. Surface water pCO2 and ancillary parameters were monitored during nine field campaigns ... ...
Biogeosciences - Tập 12 Số 20 - Trang 6125-6146
Human and livestock faecal biomarkers at the prehistorical encampment site of Ullafelsen in the Fotsch Valley, Stubai Alps, Austria – potential and limitationsAbstract. The Ullafelsen at 1869 m above sea level (a.s.l.) in the Tyrolean Stubai
Alps next to Innsbruck is an important (geo)archeological reference site
for the Mesolithic period. Buried fireplaces on the Ullafelsen plateau were
dated at 10.9 to 9.5 ka cal BP and demonstrate together with thousands of
flint stone artifacts the presence of hunter-gatherers during the Early
Holocene. Graz... ...
Biogeosciences - Tập 19 Số 4 - Trang 1135-1150
An evaluation of ocean color model estimates of marine primary productivity in coastal and pelagic regions across the globeAbstract. Nearly half of the earth's photosynthetically fixed carbon derives from the oceans. To determine global and region specific rates, we rely on models that estimate marine net primary productivity (NPP) thus it is essential that these models are evaluated to determine their accuracy. Here we assessed the skill of 21 ocean color models by comparing their estimates of depth-integrate... ...
Biogeosciences - Tập 8 Số 2 - Trang 489-503
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