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Investigating Climate Change and Reproduction: Experimental Tools from Evolutionary Biology
(2012)Working Paper -
The full greenhouse gases budget of Africa: Synthesis, uncertainties and vulnerabilities
(2013)Biogeosciences DiscussionsThis paper, developed under the framework of the RECCAP initiative, aims at providingimproved estimates of the carbon and GHG (CO2, CH4and N2O) balance of continentalAfrica. The various components and processes of the African carbon and GHG bud-get were considered, and new and available data derived by different methodologies (based on inventories, ecosystem fluxes, models, and atmospheric inversions) wereintegrated. The related uncertainties ...Working Paper -
Short-term variations of three rock glaciers and their relationship with meteorological conditions
(2015)Earth Surface Dynamics DiscussionsIn recent years, strong variations in the speed of rock glaciers have been detected,raising questions about their stability in a changed climate. In this study, we present continuous time series over three years of surface velocities of six GPS stations located on three rock glaciers in Switzerland. Intra-annual velocity variations are analyzed in relation to local meteorological factors, such as precipitation, snow(melt), as well as air ...Working Paper -
Global marine plankton functional typebiomass distributions: coccolithophores
(2012)Earth System Science Data DiscussionsCoccolithophores are calcifying marine phytoplankton of the class Prymnesiophyceae. They are considered to play an import role in the global carbon cycle through the production and export of organic carbon and calcite. We have compiled observations of global coccolithophore abundance from several existing databases as well as individual contributions of published and unpublished datasets. We make conservative estimates of carbon biomass ...Working Paper -
Differential climate impacts for policy-relevant limits to global warming: the case of 1.5° C and 2° C
(2015)Earth System Dynamics DiscussionsRobust appraisals of climate impacts at different levels of global-mean temperature increase are vital to guide assessments of dangerous anthropogenic interference with the climate system. Currently, two such levels are discussed in the context of the international climate negotiations as long-term global temperature goals: a below 2◦C and a 1.5◦C limit in global-mean temperature rise above ...Working Paper -
Flux correction for closed-path laser spectrometers without internal water vapor measaurements
(2012)Atmospheric Measurement Techniques DiscussionsRecently, instruments became available on the market that provide the possibility toperform eddy covariance flux measurements of CH4and many other trace gases, in-cluding the traditional CO2and H2O. Most of these instruments employ laser spec-troscopy, where a cross-sensitivity to H2O is frequently observed leading to an increased dilution effect. Additionally, sorption processes at the intake tube walls modifyand delay the observed H2O ...Working Paper -
Effective density of Aquadag and fullerene soot black carbon reference materials used for SP2 calibration
(2011)Atmospheric Measurement Techniques DiscussionsThe mass and effective density of black carbon (BC) particles generated from aque-ous suspensions of Aquadag and fullerene soot was measured and parametrized asa function of their mobility diameter. The measurements were made by two indepen-dent research groups by operating a differential mobility analyser (DMA) in series with an aerosol particle mass analyser (APM) or a Couette centrifugal particle mass anal-yser (CPMA). Consistent and ...Working Paper -
Hydrologic predictions in a changing environment: behavioral modeling
(2010)Hydrology and Earth System Sciences DiscussionsMost hydrological models are valid at most only in a few places and cannot be rea-sonably transferred to other places or to far distant time periods. Transfer in space isdifficult because the models are conditioned on past observations at particular placesto define parameter values and unobservable processes that are needed to fully characterize the structure and functioning of the landscape. Transfer in time has to deal withthe likely ...Working Paper -
Exploiting the weekly cycle as observed over Europe to analyse aerosol indirect effects in two climate models
(2009)Atmospheric Chemistry and Physics DiscussionsA weekly cycle in aerosol pollution and meteorological quantities is observed over Eu-rope. In the present study we exploit this effect to analyse aerosol-cloud-radiationinteractions. A weekly cycle is imposed on anthropogenic emissions in two generalcirculation models that include parameterizations of aerosol cycles and cloud micro-physics. It is found that the simulated weekly cycles in sulfur dioxide, sulfate, andaerosol optical depth ...Working Paper -
Effect of photochemical aging on the ice nucleation properties of diesel and wood burning particles
(2012)Atmospheric Chemistry and Physics DiscussionsWorking Paper