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Biogeosciences
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#1Jarmo Mäkelä (Finnish Meteorological Institute)H-Index: 3
#2Francesco Minunno (UH: University of Helsinki)H-Index: 7
Last. Mikko PeltoniemiH-Index: 18
view all 6 authors...
Abstract. Forest ecosystems are already responding to changing environmental conditions that are driven by increased atmospheric CO2 concentrations. These developments affect how societies can utilise and benefit from the woodland areas in the future, be it for example climate change mitigation as carbon sinks, lumber for wood industry, or preserved for nature tourism and recreational activities. We assess the effect and the relative magnitude of different uncertainty sources in ecosystem model ...
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#1Jérôme Kaiser (Leibniz Institute for Baltic Sea Research)H-Index: 13
#2Norbert Wasmund (Leibniz Institute for Baltic Sea Research)H-Index: 22
Last. Helge W Arz (Leibniz Institute for Baltic Sea Research)H-Index: 32
view all 9 authors...
Abstract. Summer cyanobacterial blooms represent a threat for the Baltic Sea ecosystem, causing deoxygenation of the bottom water and the spread of the so-called dead zones. The time history of the Baltic Sea cyanobacterial blooms is known from in situ and satellite observations since the early 1980s, but still not well understood. By comparing both weekly-resolved trap sediments and a well-dated sediment core from the Eastern Gotland Basin with monitoring and satellite cyanobacterial data of th...
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#1Thomas W. J. Janssen (VU: VU University Amsterdam)H-Index: 27
#2Katrin Fleischer (TUM: Technische Universität München)H-Index: 4
Last. Han Dolman (VU: VU University Amsterdam)H-Index: 10
view all 5 authors...
Abstract. The effects of future warming and drying on tropical forest functioning remain largely unresolved. Here, we conduct a meta-analysis of observed drought responses in neotropical humid forests, focused on carbon and water exchange. Measures of leaf, tree and ecosystem scale performance were retrieved from 138 published studies conducted across 229 sites in neotropical forests. Differentiating between seasonal and episodic drought we find that; (1) during seasonal drought, the increase of...
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#1Charel Wohl (UEA: University of East Anglia)
#2Ian Brown (PML: Plymouth Marine Laboratory)H-Index: 7
Last. Mingxi Yang (PML: Plymouth Marine Laboratory)H-Index: 14
view all 7 authors...
Abstract. Dimethyl sulfide and volatile organic compounds and are important for atmospheric chemistry. The oceanic emissions of biogenically derived gases, including dimethyl sulfide and especially isoprene, are not well constrained. The role of the ocean in the global budgets of atmospheric methanol, acetone and acetaldehyde is even more poorly known. In order to quantify the air-sea fluxes of these gases we measured their seawater concentrations and air mixing ratios in the Atlantic sector of ...
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#1Rene Orth (MPG: Max Planck Society)H-Index: 16
#2Georgia Destouni (Stockholm University)H-Index: 42
Last. Markus Reichstein (MPG: Max Planck Society)H-Index: 84
view all 4 authors...
Abstract. Soil moisture droughts have comprehensive implications for terrestrial ecosystems. Here we study time-accumulated impacts of the strongest observed droughts on vegetation. The results show that drought duration, the time during which surface soil moisture is below seasonal average, is a key diagnostic variable for predicting drought-integrated changes in (i) gross primary productivity, (ii) evapotranspiration, (iii) vegetation greenness, and (iv) crop yields. Drought-integrated anomali...
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#1Noelle A. Held (MIT: Massachusetts Institute of Technology)
#2Eric A. Webb (SC: University of Southern California)H-Index: 30
Last. Mak A. Saito (WHOI: Woods Hole Oceanographic Institution)H-Index: 45
view all 11 authors...
Abstract. Trichodesmium is a globally important marine microbe that provides fixed nitrogen to otherwise N limited ecosystems. In nature, nitrogen fixation is likely regulated by iron or phosphate availability, but the extent and interaction of these controls is unclear. From metaproteomics analyses using established protein biomarkers for iron and phosphate stress, we found that co-stress is the norm rather than the exception for field Trichodesmium colonies. Counter-intuitively, the nitrogenas...
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#1Sabine Haalboom (UU: Utrecht University)
#2David M. Price (University of Southampton)
Last. Gerard C.A. Duineveld (UU: Utrecht University)H-Index: 9
view all 8 authors...
Abstract. Hydrothermal vent fields found at mid-ocean ridges emit hydrothermal fluids that disperse as neutrally buoyant plumes. From these fluids seafloor massive sulfides (SMS) deposits are formed, which are being explored as possible new mining sites for (trace) metals and rare earth elements (REEs). It has been suggested that during mining activities large amounts of suspended matter will appear in the water column due to excavation processes and discharge of mining waste from the surface ve...
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#1Jiantao Cao (Lanzhou University)H-Index: 1
#2Zhiguo RaoH-Index: 19
Last. Guodong Jia (Tongji University)H-Index: 1
view all 4 authors...
Abstract. It has been frequently found that lacustrine branched glycerol dialkyl glycerol tetraethers (brGDGT)-derived temperatures are warm-season-biased relative to measured mean annual air temperature (AT) in the middle to high latitudes, the mechanism of which, however, is not very clear. Here, we investigated the brGDGTs from catchment soils, suspended particulate matter (SPM) and surface sediments in different water depths in Gonghai Lake in northern China to explore this question. Our res...
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#1Marcus B. Wallin (Uppsala University)H-Index: 18
#2Joachim Audet (AU: Aarhus University)H-Index: 13
Last. Mattias Winterdahl (Uppsala University)H-Index: 6
view all 5 authors...
Abstract. Headwater streams are known to be hotspots for carbon dioxide (CO2) emissions to the atmosphere and are hence important components in landscape carbon balances. However, surprisingly little is known about stream CO2 dynamics and emissions in agricultural settings, a land-use type that globally cover ca 40 % of the continental area. Here we present continuously measured in-situ CO2 concentration data from a temperate agricultural headwater stream covering more than one year of open-wate...
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#1Helmke Hepach (Ebor: University of York)H-Index: 7
#2Claire Hughes (Ebor: University of York)H-Index: 15
Last. Rosie Chance (Ebor: University of York)H-Index: 12
view all 5 authors...
Abstract. The reaction between ozone and iodide at the sea surface is now known to be an important part of atmospheric ozone cycling, causing ozone deposition and the release of ozone-depleting reactive iodine to the atmosphere. The importance of this reaction is reflected by its inclusion in chemical transport models (CTMs). Such models depend on accurate sea surface iodide fields, but measurements are spatially and temporally limited. Hence, the ability to predict current and future sea surfac...
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