Zobrazeno 1 - 10
of 150
pro vyhledávání: '"M. Pahlow"'
Publikováno v:
Biogeosciences, Vol 21, Pp 4361-4380 (2024)
Nitrogen (N) is a crucial limiting nutrient for phytoplankton growth in the ocean. The main source of bioavailable N in the ocean is delivered by N2-fixing diazotrophs in the surface layer. Since field observations of N2 fixation are spatially and te
Externí odkaz:
https://doaj.org/article/000ff65d6def41c18912d9b1c5a71dff
Publikováno v:
Geoscientific Model Development, Vol 16, Pp 95-108 (2023)
The acclimative response of phytoplankton, which adjusts their nutrient and pigment content in response to changes in ambient light, nutrient levels, and temperature, is an important determinant of observed chlorophyll distributions and biogeochemist
Externí odkaz:
https://doaj.org/article/a93c64a8a08744349d3c5e5e307aeaa7
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 4663-4690 (2020)
Uncertainties in projections of marine biogeochemistry from Earth system models (ESMs) are associated to a large degree with the imperfect representation of the marine plankton ecosystem, in particular the physiology of primary and secondary producer
Externí odkaz:
https://doaj.org/article/8b92fa64395d4f3c88dc69e9161bc79d
Publikováno v:
Geoscientific Model Development, Vol 13, Pp 4691-4712 (2020)
We analyse 400 perturbed-parameter simulations for two configurations of an optimality-based plankton–ecosystem model (OPEM), implemented in the University of Victoria Earth System Climate Model (UVic-ESCM), using a Latin hypercube sampling method
Externí odkaz:
https://doaj.org/article/05afda68abcb4a2a8be6736e023c3ee1
Autor:
S. Multsch, M. S. Krol, M. Pahlow, A. L. C. Assunção, A. G. O. P. Barretto, Q. de Jong van Lier, L. Breuer
Publikováno v:
Hydrology and Earth System Sciences, Vol 24, Pp 307-324 (2020)
Expanding irrigated cropping areas is one of Brazil's strategies to increase agricultural production. This expansion is constrained by water policy goals to restrict water scarcity to acceptable levels. We therefore analysed the trade-off between lev
Externí odkaz:
https://doaj.org/article/c57eefdea2e64c07beda77757abae7af
Publikováno v:
Biogeosciences, Vol 13, Iss 17, Pp 4985-5001 (2016)
Both atmospheric deposition and benthic remineralisation influence the marine nitrogen cycle, and hence ultimately also marine primary production. The biological and biogeochemical relations in the eastern tropical South Pacific (ETSP) among nitrogen
Externí odkaz:
https://doaj.org/article/364e6b0c24424ca8b53767aa3886d65c
Autor:
C. R. Löscher, H. W. Bange, R. A. Schmitz, C. M. Callbeck, A. Engel, H. Hauss, T. Kanzow, R. Kiko, G. Lavik, A. Loginova, F. Melzner, J. Meyer, S. C. Neulinger, M. Pahlow, U. Riebesell, H. Schunck, S. Thomsen, H. Wagner
Publikováno v:
Biogeosciences, Vol 13, Iss 12, Pp 3585-3606 (2016)
Recent modeling results suggest that oceanic oxygen levels will decrease significantly over the next decades to centuries in response to climate change and altered ocean circulation. Hence, the future ocean may experience major shifts in nutrient cyc
Externí odkaz:
https://doaj.org/article/6e15c26bc8ed43d3a8dd499ffea8dde3
Publikováno v:
Biogeosciences, Vol 12, Iss 4, Pp 1113-1130 (2015)
Local coupling between nitrogen fixation and denitrification in current biogeochemical models could result in runaway feedback in open-ocean oxygen minimum zones (OMZs), eventually stripping OMZ waters of all fixed nitrogen. This feedback does not
Externí odkaz:
https://doaj.org/article/ed4f462e5aa04c769d55afc6bfaae26a
Publikováno v:
Biogeosciences, Vol 11, Iss 12, Pp 3397-3407 (2014)
Marine ecosystem models used to investigate how global change affects ocean ecosystems and their functioning typically omit pelagic plankton diversity. Diversity, however, may affect functions such as primary production and their sensitivity to envir
Externí odkaz:
https://doaj.org/article/a1b0dcd41983456cacc37ea4231dadfd
Publikováno v:
Natural Hazards and Earth System Sciences, Vol 9, Iss 4, Pp 1349-1363 (2009)
As a result of the severe floods in Europe at the turn of the millennium, the ongoing shift from safety oriented flood control towards flood risk management was accelerated. With regard to technical flood control measures it became evident that the e
Externí odkaz:
https://doaj.org/article/9dddc69d343445e6896aac3a18527b51