A thermodynamic approach to link self-organization, preferential flow and rainfall–runoff behaviour Hydrology and Earth System Sciences DOI 10.5194/hess-17-4297-2013 1 November 2013 This study investigates whether a thermodynamically optimal hillslope structure can, if existent, serve as a first guess for uncalibrated predictions of rainfall–runoff. Read more
Filamentary structure in chemical tracer distributions near the subtropical jet following a wave breaking event Atmospheric Chemistry and Physics DOI 10.5194/acp-13-10517-2013 31 October 2013 This paper presents a set of observations and analyses of trace gas cross sections in the extratropical upper troposphere/lower stratosphere (UTLS). Read more
Nitrous Oxide (N2O) production in axenic Chlorella vulgaris microalgae cultures: evidence, putative pathways, and potential environmental impacts Biogeosciences DOI 10.5194/bg-10-6737-2013 25 October 2013 Using antibiotic assays and genomic analysis, this study demonstrates nitrous oxide (N2O) is generated from axenic Chlorella vulgaris cultures. In batch assays, this production is magnified under conditions favouring intracellular nitrite accumulation, but repressed when nitrate reductase (NR) activity is inhibited. Read more
Global monitoring of terrestrial chlorophyll fluorescence from moderate-spectral-resolution near-infrared satellite measurements: methodology, simulations, and application to GOME-2 Atmospheric Measurement Techniques DOI 10.5194/amt-6-2803-2013 25 October 2013 Here, we describe a new methodology to retrieve global far-red fluorescence information; we use hyperspectral data with a simplified radiative transfer model to disentangle the spectral signatures of three basic components: atmospheric absorption, surface reflectance, and fluorescence radiance. An empirically based principal component analysis approach is employed, primarily using cloudy data over ocean, to model and solve for the atmospheric absorption. Read more
Cloud-resolving simulations of mercury scavenging and deposition in thunderstorms Atmospheric Chemistry and Physics DOI 10.5194/acp-13-10143-2013 15 October 2013 This study examines dynamical and microphysical features of convective clouds that affect mercury (Hg) wet scavenging and concentrations in rainfall. Read more
Carbonate mineral saturation states in the East China Sea: present conditions and future scenarios Biogeosciences DOI 10.5194/bg-10-6453-2013 11 October 2013 To assess the impact of rising atmospheric CO2 and eutrophication on the carbonate chemistry of the East China Sea shelf waters, saturation states (Ω) for two important biologically relevant carbonate minerals were calculated throughout the water column. Read more
A novel salinity proxy based on Na incorporation into foraminiferal calcite Biogeosciences DOI 10.5194/bg-10-6375-2013 9 October 2013 This study investigates the impact of salinity on foraminiferal Na/Ca values by laser ablation ICP-MS analyses of specimens of the benthic foraminifer Ammonia tepida cultured at a range of salinities (30.0–38.6). Read more
Critical impacts of global warming on land ecosystems Earth System Dynamics DOI 10.5194/esd-4-347-2013 8 October 2013 Here we present a macro-scale analysis of climate change impacts on terrestrial ecosystems based on newly developed sets of climate scenarios featuring a step-wise sampling of global mean temperature increase between 1.5 and 5 K by 2100. Read more
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. 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. Read more
