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What can we learn from long-term groundwater data to improve climate change impact studies?
(2011)Hydrology and Earth System Sciences DiscussionsFuture risks for groundwater resources, due to global change are usually analyzed bydriving hydrological models with the outputs of climate models. However, this modelchain is subject to considerable uncertainties. Given the high uncertainties it is es-sential to identify the processes governing the groundwater dynamics, as these processes are likely to affect groundwater resources in the future, too. Information aboutthe dominant mechanisms ...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 -
Response of δ13C in plant and soil respiration to a water pulse
(2011)Biogeosciences DiscussionsStable carbon isotopes have been used to assess the coupling between changes in environmental conditions and the response of soil or ecosystem respiration, usually by studying the time-lagged response of δ13C of respired CO2 (δ13CR) to changes in photosynthetic carbon isotope discrimination (Δi). However, the lack of a systematic response of δ13CR to environmental changes in field studies stresses the need to better understand the mechanisms ...Working Paper -
Carbon allocation and carbon isotope fluxes in the plant-soil-atmosphere continuum: a review
(2011)Biogeosciences DiscussionsWorking Paper -
Bacteria in the ECHAM5-HAM global climate model
(2011)Atmospheric Chemistry and Physics DiscussionsBacteria are the most active naturally occuring ice nuclei (IN) due to the ice nucleationactive proteins on their surface, which serve as active sites for ice nucleation. Theirpotential impact on clouds and precipitation is not well known and needs to be inves-tigated. Bacteria as a new aerosol species were introduced into the global climate model (GCM) ECHAM5-HAM. The inclusion of bacteria acting as IN in a GCM leadsto only minor changes ...Working Paper