From andrew.frampton at natgeo.su.se Sun Feb 3 19:58:44 2013 From: andrew.frampton at natgeo.su.se (Andrew Frampton) Date: Sun, 03 Feb 2013 19:58:44 +0100 Subject: [Bolincentret-at-su.se] =?iso-8859-1?q?Seminar_Wednesday_13_Febru?= =?iso-8859-1?q?ary_at_14=3A00_-_15=3A00=2C_Nordenski=F6ld?= Message-ID: <510EB364.7040607@natgeo.su.se> Welcome to a seminar on How to include the High Arctic in your geoscience education - about the University Centre in Svalbard, UNIS study possibilities. by Hanne Christiansen, The University Centre in Svalbard Wednesday 13 February at 14:00 - 15:00 Nordenski?ld, Geohuset Hanne Christiansen is professor in physical geography at The University Centre in Svalbard (UNIS). Her research concerns periglacial geomorphology with focus on permafrost and its climatic controls. In this seminar she will introduce UNIS as an institution and their specialised high-level courses which are of particular relevance for students at undergraduate, master and doctoral levels interested in cryosphere research. From axel.horst at itm.su.se Tue Feb 5 16:19:45 2013 From: axel.horst at itm.su.se (Axel Horst) Date: Tue, 5 Feb 2013 16:19:45 +0100 Subject: [Bolincentret-at-su.se] Reminder: Tomorrows BGC+ATM seminar, 6 February, 13:00 Message-ID: <1360077585541451500@itm.su.se> Lectures in Biogeochemistry and Atmospheric Science Wednesday 6 February at 13:00 Ahlmansalen, Geohuset NorESM - A testbed for Nordic research on aerosol-climate interactions by Trond Iversen, Norwegian Meteorological Institute, Oslo, Norway The Bolin Centre for Climate Research, the Department of Applied Environmental Science and the Department of Geological Sciences Organizers : Patrick Crill, (patrick.crill at geo.su.se), ?rjan Gustafsson, (orjan.gustafsson at itm.su.se), Axel Horst, (axel.horst at itm.su.se), From georgia.destouni at natgeo.su.se Fri Feb 8 09:11:14 2013 From: georgia.destouni at natgeo.su.se (Gia Destouni) Date: Fri, 8 Feb 2013 09:11:14 +0100 Subject: [Bolincentret-at-su.se] PhD defense Friday, 15th February at 13:00: Hydrological Modeling for Climate Change Impact Assessment Message-ID: Welcome to the PhD defense of Claudia Teutschbein on: Hydrological Modeling for Climate Change Impact Assessment: Transferring Large-Scale Information from Global Climate Models to the Catchment Scale When: Friday, 15th February at 13:00 Where: Nordenski?ldsalen, Geovetenskapens hus, Svante Arrhenius v?g 12, Stockholm Opponent: Prof. Chris Kilsby, School of Civil Engineering and Geosciences, Newcastle University Abstract A changing climate can severely perturb regional hydrology and thereby affect human societies and life in general. To assess and simulate such potential hydrological climate change impacts, hydrological models require reliable meteorological variables for current and future climate conditions. Global climate models (GCMs) provide such information, but their spatial scale is too coarse for regional impact studies. Thus, GCM output needs to be downscaled to a finer scale either through statistical downscaling or through dynamic regional climate models (RCMs). However, even downscaled meteorological variables are often considerably biased and therefore not directly suitable for hydrological impact modeling. This doctoral thesis discusses biases and other challenges related to incorporating climate model output into hydrological studies and evaluates possible strategies to address them. An analysis of possible sources of uncertainty stressed the need for full ensembles approaches, which should become standard practice to obtain robust and meaningful hydrological projections under changing climate conditions. Furthermore, it was shown that substantial biases in current RCM simulations exist and that correcting them is an essential prerequisite for any subsequent impact simulation. Bias correction algorithms considerably improved RCM output and subsequent streamflow simulations under current conditions. In addition, differential split-sample testing was highlighted as a powerful tool for evaluating the transferability of bias correction algorithms to changed conditions. Finally, meaningful projections of future streamflow regimes could be realized by combining a full ensemble approach with bias correction of RCM output: Current flow regimes in Sweden with a snowmelt-driven spring flood in April will likely change to rather damped flow regimes that are dominated by large winter streamflows. Key words: Bias Correction, Climate Change, Climate Models, Ensembles, GCM, HBV, Hydrological Modeling, Precipitation, RCM, Split Sample Test, Streamflow, Sweden, Temperature, Uncertainty Welcome! Gia -- Georgia Destouni Professor of Hydrology, Hydrogeology and Water Resources Department of Physical Geography and Quaternary Geology Stockholm University SE-106 91 Stockholm Telephone: +46 (0)8 164785 Fax: +46 (0)8 16 4794 e-mail: georgia.destouni at natgeo.su.se http://giadestouni.blogspot.se/ From georgia.destouni at natgeo.su.se Fri Feb 8 10:53:30 2013 From: georgia.destouni at natgeo.su.se (Gia Destouni) Date: Fri, 8 Feb 2013 10:53:30 +0100 Subject: [Bolincentret-at-su.se] PhD defense Monday, March 11 at 13:00: Arctic Climate and Water Change Message-ID: Please note the date and welcome to the PhD defense of Arvid Bring on: Arctic Climate and Water Change: Information Relevance for Assessment and Adaptation When: Monday, April 3 at 13:00 Where: De Geer salen, Geovetenskapens hus, Svante Arrhenius v?g 12, Stockholm Opponent: Richard Lammers, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, USA Abstract The Arctic is subject to growing economic and political interest. Its climate, environment and water cycle are undergoing rapid and significant changes that will have profound effects, not only on local, but also on regional and global scales. Relevant and accessible information about water and climate change is therefore vital for both scientists and policymakers, as there is a need to detect, understand and adapt to the challenges ahead. This thesis investigates the adequacy and relevance of hydrological monitoring systems and climate model data, as well as our understanding of hydro-climatic change, for adaptation to water system changes in the Arctic. Results indicate a lack of harmonized water chemistry data for the pan-Arctic drainage basin. This may impede efforts to understand transport and origin of key waterborne constituents. To prioritize hydrological monitoring development under limited resources, robust information on where climate change will be the most severe is needed. However, observations and projections diverge in this regard. Climate model simulations of drainage basin temperature and precipitation have improved between the two most recent model generations, but large inaccuracies remain for precipitation projections. Late 20th-century discharge changes in major Arctic rivers generally show excess of water relative to precipitation changes. This indicates a possible contribution of stored water from permafrost or groundwater to sea level rise, even when considering data uncertainty on Arctic precipitation. The river contribution to the increasing Arctic Ocean freshwater inflow matches that of glaciers, which underlines the importance of full water cycle understanding and accounting when assessing change. To provide adequate information for research and policy, Arctic hydrological and hydro-chemical monitoring needs to be extended, better integrated and more accessible. This especially applies to hydrochemistry, where a more complete set of basins and a general extension for the large unmonitored areas closer to the Arctic Ocean is motivated. Improvements in climate model parameterizations are needed in particular for precipitation projections, and further water-focused data and modeling efforts are required to resolve the source of excess discharge in Arctic rivers. Keywords: Arctic, hydrology, monitoring, climate change, water management, general circulation models, adaptation Welcome! Gia -- Georgia Destouni Professor of Hydrology, Hydrogeology and Water Resources Department of Physical Geography and Quaternary Geology Stockholm University SE-106 91 Stockholm Telephone: +46 (0)8 164785 Fax: +46 (0)8 16 4794 e-mail: georgia.destouni at natgeo.su.se http://giadestouni.blogspot.se/ From georgia.destouni at natgeo.su.se Fri Feb 8 11:05:18 2013 From: georgia.destouni at natgeo.su.se (Gia Destouni) Date: Fri, 8 Feb 2013 11:05:18 +0100 Subject: [Bolincentret-at-su.se] Fwd: PhD defense Monday, March 11 at 13:00: Arctic Climate and Water Change References: Message-ID: Please see date correction, to March 11, in the text below; date in the Subject line is correct. Gia Begin forwarded message: > Please note the date and welcome to the PhD defense of Arvid Bring on: > > Arctic Climate and Water Change: Information Relevance for Assessment and Adaptation > > > When: Monday, March 11 at 13:00 > Where: De Geer salen, Geovetenskapens hus, Svante Arrhenius v?g 12, Stockholm > > Opponent: Richard Lammers, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, USA > > Abstract > > > The Arctic is subject to growing economic and political interest. Its climate, environment and water cycle are undergoing rapid and significant changes that will have profound effects, not only on local, but also on regional and global scales. Relevant and accessible information about water and climate change is therefore vital for both scientists and policymakers, as there is a need to detect, understand and adapt to the challenges ahead. This thesis investigates the adequacy and relevance of hydrological monitoring systems and climate model data, as well as our understanding of hydro-climatic change, for adaptation to water system changes in the Arctic. Results indicate a lack of harmonized water chemistry data for the pan-Arctic drainage basin. This may impede efforts to understand transport and origin of key waterborne constituents. To prioritize hydrological monitoring development under limited resources, robust information on where climate change will be the most severe is needed. However, observations and projections diverge in this regard. Climate model simulations of drainage basin temperature and precipitation have improved between the two most recent model generations, but large inaccuracies remain for precipitation projections. Late 20th-century discharge changes in major Arctic rivers generally show excess of water relative to precipitation changes. This indicates a possible contribution of stored water from permafrost or groundwater to sea level rise, even when considering data uncertainty on Arctic precipitation. The river contribution to the increasing Arctic Ocean freshwater inflow matches that of glaciers, which underlines the importance of full water cycle understanding and accounting when assessing change. To provide adequate information for research and policy, Arctic hydrological and hydro-chemical monitoring needs to be extended, better integrated and more accessible. This especially applies to hydrochemistry, where a more complete set of basins and a general extension for the large unmonitored areas closer to the Arctic Ocean is motivated. Improvements in climate model parameterizations are needed in particular for precipitation projections, and further water-focused data and modeling efforts are required to resolve the source of excess discharge in Arctic rivers. > > Keywords: Arctic, hydrology, monitoring, climate change, water management, general circulation models, adaptation > > > Welcome! > > Gia > -- > Georgia Destouni > Professor of Hydrology, Hydrogeology and Water Resources > Department of Physical Geography and Quaternary Geology > Stockholm University > SE-106 91 Stockholm > Telephone: +46 (0)8 164785 > Fax: +46 (0)8 16 4794 > e-mail: georgia.destouni at natgeo.su.se > http://giadestouni.blogspot.se/ > From axel.horst at itm.su.se Thu Feb 14 13:42:31 2013 From: axel.horst at itm.su.se (Axel Horst) Date: Thu, 14 Feb 2013 13:42:31 +0100 Subject: [Bolincentret-at-su.se] BGC+ATM seminar, Wednesday 20 February, 13:00 Message-ID: <1360845751129946500@itm.su.se> Lectures in Biogeochemistry and Atmospheric Science Wednesday 20 February at 13:00 Ahlmansalen, Geohuset Understanding Arctic methane emissions with isotope measurements in sediment, water, air and ice by C?lia Sapart, Inst. for Marine and Atm. research, Utrecht, Netherlands The Bolin Centre for Climate Research, the Department of Applied Environmental Science and the Department of Geological Sciences Organizers : Patrick Crill, (patrick.crill at geo.su.se), ?rjan Gustafsson, (orjan.gustafsson at itm.su.se), Axel Horst, (axel.horst at itm.su.se), From elena.kirillova at itm.su.se Tue Feb 19 08:32:46 2013 From: elena.kirillova at itm.su.se (Elena Kirillova) Date: Tue, 19 Feb 2013 08:32:46 +0100 Subject: [Bolincentret-at-su.se] Reminder: BGC+ATM seminar, Wednesday 20 February, 13:00 In-Reply-To: <1360845751129946500@itm.su.se> References: <1360845751129946500@itm.su.se> Message-ID: <1361259166282391500@itm.su.se> Lectures in Biogeochemistry and Atmospheric Science Wednesday 20 February at 13:00 Ahlmansalen, Geohuset Understanding Arctic methane emissions with isotope measurements in sediment, water, air and ice by C?lia Sapart, Inst. for Marine and Atm. research, Utrecht, Netherlands The Bolin Centre for Climate Research, the Department of Applied Environmental Science and the Department of Geological Sciences Organizers : Patrick Crill, (patrick.crill at geo.su.se), ?rjan Gustafsson, (orjan.gustafsson at itm.su.se), Axel Horst, (axel.horst at itm.su.se), _______________________________________________ Bolincentret-at-su.se mailing list Bolincentret-at-su.se at lists.su.se https://lists.su.se/mailman/listinfo/bolincentret-at-su.se From bjorn.eriksson at geo.su.se Thu Feb 21 23:03:31 2013 From: bjorn.eriksson at geo.su.se (=?iso-8859-1?Q?Bj=F6rn_Eriksson?=) Date: Thu, 21 Feb 2013 23:03:31 +0100 Subject: [Bolincentret-at-su.se] =?iso-8859-1?q?Agatha_de_Boer_-_Docentf?= =?iso-8859-1?q?=F6rel=E4sning?= Message-ID: <6EDEAEF0-A074-4B25-B648-6A61EDB7C511@geo.su.se> Den 6 mars kl. 10:15-11:00 h?ller Agatha de Boer sin docentf?rel?sning i Nordenski?ldsalen med titeln Salinity, temperature, and density: definitions and impact on ocean circulation ?mnet f?r docenturen ?r fysisk paleoceanografi. Varmt v?lkomna, Martin ################################################################################ Agatha de Boer is giving her Docent lecture March 6, 10:15-11:00 in Nordenski?ldsalen. The title of the lecture is Salinity, temperature, and density: definitions and impact on ocean circulation The subject for the docenture is physical paleoceanography. Welcome Martin -- Martin Jakobsson Professor in Marine Geology and Geophysics Head of Department Department of Geological Sciences Stockholm University 106 91 Stockholm, Sweden phone: (+46)-8-16 47 19 mobile: (+46)-73-619 14 09 fax:: (+46)-8-674 78 97 email: martin.jakobsson at geo.su.se -------------- next part -------------- -- Bj?rn Eriksson bjorn.eriksson at geo.su.se From georgia.destouni at natgeo.su.se Wed Feb 27 11:41:26 2013 From: georgia.destouni at natgeo.su.se (Gia Destouni) Date: Wed, 27 Feb 2013 11:41:26 +0100 Subject: [Bolincentret-at-su.se] REMINDER: PhD defense, Monday March 11, 13:00, on Arctic Climate and Water Change Message-ID: <9732AC11-9DE2-40C2-AE3E-287BD9D058A0@natgeo.su.se> Welcome to the PhD defense of Arvid Bring on: Arctic Climate and Water Change: Information Relevance for Assessment and Adaptation When: Monday, March 11 at 13:00 Where: De Geer salen, Geovetenskapens hus, Svante Arrhenius v?g 12, Stockholm Opponent: Dr. Richard Lammers, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, USA Abstract The Arctic is subject to growing economic and political interest. Its climate, environment and water cycle are undergoing rapid and significant changes that will have profound effects, not only on local, but also on regional and global scales. Relevant and accessible information about water and climate change is therefore vital for both scientists and policymakers, as there is a need to detect, understand and adapt to the challenges ahead. This thesis investigates the adequacy and relevance of hydrological monitoring systems and climate model data, as well as our understanding of hydro-climatic change, for adaptation to water system changes in the Arctic. Results indicate a lack of harmonized water chemistry data for the pan-Arctic drainage basin. This may impede efforts to understand transport and origin of key waterborne constituents. To prioritize hydrological monitoring development under limited resources, robust information on where climate change will be the most severe is needed. However, observations and projections diverge in this regard. Climate model simulations of drainage basin temperature and precipitation have improved between the two most recent model generations, but large inaccuracies remain for precipitation projections. Late 20th-century discharge changes in major Arctic rivers generally show excess of water relative to precipitation changes. This indicates a possible contribution of stored water from permafrost or groundwater to sea level rise, even when considering data uncertainty on Arctic precipitation. The river contribution to the increasing Arctic Ocean freshwater inflow matches that of glaciers, which underlines the importance of full water cycle understanding and accounting when assessing change. To provide adequate information for research and policy, Arctic hydrological and hydro-chemical monitoring needs to be extended, better integrated and more accessible. This especially applies to hydrochemistry, where a more complete set of basins and a general extension for the large unmonitored areas closer to the Arctic Ocean is motivated. Improvements in climate model parameterizations are needed in particular for precipitation projections, and further water-focused data and modeling efforts are required to resolve the source of excess discharge in Arctic rivers. Keywords: Arctic, hydrology, monitoring, climate change, water management, general circulation models, adaptation -- Georgia Destouni Professor of Hydrology, Hydrogeology and Water Resources Department of Physical Geography and Quaternary Geology Stockholm University SE-106 91 Stockholm Telephone: +46 (0)8 164785 Fax: +46 (0)8 16 4794 e-mail: georgia.destouni at natgeo.su.se http://giadestouni.blogspot.se/ From georgia.destouni at natgeo.su.se Wed Feb 27 11:44:02 2013 From: georgia.destouni at natgeo.su.se (Gia Destouni) Date: Wed, 27 Feb 2013 11:44:02 +0100 Subject: [Bolincentret-at-su.se] PhD defense, Wednesday April 3, 13:00, on Hydro-Climatic Change in Irrigated World Regions Message-ID: Welcome to the PhD defense of Shilpa M. Asokan on: Hydro-Climatic Change in Irrigated World Regions When: Wednesday, April 3 at 13:00 Where: Nordenski?ldsalen, Geovetenskapens hus, Svante Arrhenius v?g 12, Stockholm Opponent: Prof. Howard Wheater, Global Institute for Water Security, School of Environment and Sustainability, University of Saskatchewan, Canada Abstract Understanding of hydro-climatic changes in the world?s river basins is required, for instance towards ensuring future food security. Different regional basins experience different levels of hydro-climatic change and different water resource impacts of climate change depending on the endorheic (discharging into terminal inland water) or exorheic (discharging into the ocean) nature of a hydrological basin, along with the climatic conditions and human land-use and water-use practices (for instance for agriculture and its irrigation) within the basin. This thesis has analyzed long-term hydro-climatic changes in two main irrigated regions of the world: the Mahanadi River Basin (MRB) in India and the Aral region in Central Asia, including the terminal Aral Sea and the hydrological basin draining into it. The thesis applies a basin-wise, data-driven water balance-constrained approach to understanding and quantifying the hydro-climatic changes, and to distinguish their main drivers in the past century and for future scenario projections. Results point at human water-use and water re-distribution for irrigation within a basin as a major driver of water balance and water resource changes, which also affect surface temperature in the region. Cross-regional comparison between change results for the two different study basins clarifies the importance of different perspectives on hydro-climatic change. One perspective may for instance focus on the climatically important changes of water, vapor and latent heat fluxes at the land surface, while another may focus on changes to water resource availability in the landscape, with different change drivers then being dominant from these different perspectives on continental water change. Thesis results show that irrigation-driven changes in evapotranspiration and latent heat fluxes and associated temperature changes at the land surface may be greater in regions with small relative irrigation impacts on water availability in the landscape (here represented by MRB) than in regions with severe such impacts (here represented by the Aral region). This implies that one cannot from knowledge about only one aspect of hydro-climatic change (such as temperature and precipitation changes at the land surface as given from climate modeling) simply extrapolate the impact importance of those changes for other types of water changes (such as on availability of water resources) in a region. Climate model projections from General Circulation Models (GCMs) used in the fourth assessment report (AR4) of the Intergovernmental Panel on Climate Change (IPCC) were also studied in the thesis regarding their performance against hydrologically important, basin-scale observational temperature and precipitation datasets. Results show lack of consistency in individual GCM performance with regard to temperature and to precipitation, implying difficulties to identify well-performing GCMs with regard to both of these variables in a region. For the example study case of the Aral region, the thesis shows that consideration of the ensemble mean of different GCM outputs may instead provide robust projection of future hydro-climate changes in a regional hydrological basin. Keywords: Climate change, hydro-climatic change, evapotranspiration, irrigation, water demand, water balance, land-use, water-use, hydrological catchment, Aral Sea, India, Mahanadi River Basin -- Georgia Destouni Professor of Hydrology, Hydrogeology and Water Resources Department of Physical Geography and Quaternary Geology Stockholm University SE-106 91 Stockholm Telephone: +46 (0)8 164785 Fax: +46 (0)8 16 4794 e-mail: georgia.destouni at natgeo.su.se http://giadestouni.blogspot.se/