Remote sensing of LAI, chlorophyll and leaf nitrogen pools of crop- and grasslands in five European landscapes Biogeosciences DOI 10.5194/bg-10-6279-2013 7 October 2013 The purpose of this study is to use field-based and satellite remote-sensing-based methods to assess leaf nitrogen pools in five diverse European agricultural landscapes located in Denmark, Scotland (United Kingdom), Poland, the Netherlands and Italy. LAI, chlorophyll and leaf nitrogen pools of crop- and grasslands in five European landscapes">Read more
Naphthalene SOA: redox activity and naphthoquinone gas–particle partitioning Atmospheric Chemistry and Physics DOI 10.5194/acp-13-9731-2013 2 October 2013 Chamber secondary organic aerosol from low-NOx photooxidation of naphthalene by hydroxyl radical was examined with respect to its redox cycling behaviour using the dithiothreitol assay. SOA: redox activity and naphthoquinone gas–particle partitioning">Read more
Multiple stressors of ocean ecosystems in the 21st century: projections with CMIP5 models Biogeosciences DOI 10.5194/bg-10-6225-2013 2 October 2013 Ocean ecosystems are increasingly stressed by human-induced changes of their physical, chemical and biological environment. Here, we use the most recent simulations performed in the framework of the Coupled Model Intercomparison Project 5 to assess how stressors such as warming, acidification deoxygenation and changes in primary productivity by marine phytoplankton, may evolve over the course of the 21st century. Read more
Antarctic ice-mass balance 2003 to 2012: regional reanalysis of GRACE satellite gravimetry measurements with improved estimate of glacial-isostatic adjustment based on GPS uplift rates The Cryosphere DOI 10.5194/tc-7-1499-2013 25 September 2013 We present regional-scale mass balances for 25 drainage basins of the Antarctic Ice Sheet (AIS) from satellite observations of the Gravity and Climate Experiment (GRACE) for time period January 2003 to September 2012. GRACE satellite gravimetry measurements with improved estimate of glacial-isostatic adjustment based on GPS uplift rates">Read more
The impact of nitrogen and phosphorous limitation on the estimated terrestrial carbon balance and warming of land use change over the last 156 yr Earth System Dynamics DOI 10.5194/esd-4-333-2013 16 September 2013 We examine the impact of land use and land cover change (LULCC) over the period from 1850 to 2005 using an Earth system model that incorporates nitrogen and phosphorous limitation on the terrestrial carbon cycle. Read more
Stereoscopic determination of all-sky altitude map of aurora using two ground-based Nikon DSLR cameras Annales Geophysicae DOI 10.5194/angeo-31-1543-2013 6 September 2013 A new stereoscopic measurement technique is developed to obtain an all-sky altitude map of aurora using two ground-based digital single-lens reflex (DSLR) cameras. DSLR cameras">Read more
Black carbon in the Arctic: the underestimated role of gas flaring and residential combustion emissions Atmospheric Chemistry and Physics DOI 10.5194/acp-13-8833-2013 5 September 2013 Chemistry transport models and climate chemistry models struggle to reproduce the Arctic Haze phenomenon, and this has recently prompted changes in aerosol removal schemes to remedy the modeling problems. In this paper, we show that shortcomings in current emission data sets are at least as important. Read more
The magnitude and causes of uncertainty in global model simulations of cloud condensation nuclei Atmospheric Chemistry and Physics DOI 10.5194/acp-13-8879-2013 5 September 2013 Here we perform a variance-based analysis of a global 3-D aerosol microphysics model to quantify the magnitude and leading causes of parametric uncertainty in model-estimated present-day concentrations of cloud condensation nuclei. Read more
Global CO2 fluxes estimated from GOSAT retrievals of total column CO2 Atmospheric Chemistry and Physics DOI 10.5194/acp-13-8695-2013 3 September 2013 This paper presents one of the first estimates of the global distribution of CO2surface fluxes using total column CO2 measurements retrieved by the SRON-KIT RemoTeC algorithm from the Greenhouse gases Observing SATellite (GOSAT). GOSAT retrievals of total column CO2">Read more
Gravitational separation in the stratosphere – a new indicator of atmospheric circulation Atmospheric Chemistry and Physics DOI 10.5194/acp-13-8787-2013 3 September 2013 The O2/N2 ratio observed in the middle stratosphere, corrected for gravitational separation, showed the same mean air age as estimated from the CO2 mole fraction. Therefore, gravitational separation is usable as a new indicator of changes in the atmospheric circulation in the stratosphere. Read more
