2020 25.12.2020 Merry Christmas Even an extraordinary year comes to an end. The Climatology Group wishes everyone a peaceful holiday season, merry Christmas and a happy new year. 23.12.2020 New People Dr. Martin Wegmann started this autumn as a PostDoc for a 1-year project in the Climatology Group. After doing PostDocs in France and Germany and being a science coordinator at WMO in Geneva, he found his way back to the GIUB, as he already did his Master and PhD here. His project WINTER (Winter clImate predictionN wiTh machinE leaRning) will focus on using machine learining tools to fill in gaps in our knowledge about past winter climates, specifically the last 400-500 years. 23.12.2020 New People Moritz Burger started this autumn as a PhD in the Climatology Group. He was already at the GIUB during his Masters in Climate Science and studied the spatial pattern of the urban heat in Bern for his master thesis. He will intensify this research for his PhD in order to identify and evaluate local adaption strategies for the global climate crisis. 23.12.2020 New People Lucas Pfister started this autumn as a PhD in the Climatology Group. He has already written his master thesis at GIUB, studying statistical reconstruction of daily temperature and precipitation fields in Switzerland back to 1864. In his PhD-project, he will work with dynamical downscaling and data assimilation for climate events back to the early 19th century. 16.12.2020 50 Jahre Klimaforschung am GIUB Eine filmische Dokumentation statt Jubiläumssymposium im COVID-Jahr. Stefan Brönnimann zeigt mit Archivmaterial und aktuellen Interviews wissenschaftsgeschichtlich und persönlich, wie die Berner Geographie an der Schnittstelle von internationaler Forschung zu Gesellschaft, Politik und Verwaltung wirkt. Produziert wurde die Collage zusammen mit dem mLAB des Geographischen Instituts. Zum Interview und einer ausführlicheren Mitteilung. 16.12.2020 «Klimawandel und Jahreszeiten» Gleichzeitig zum Film erscheint in diesen Tagen auch die Broschüre «Klimawandel und Jahreszeiten». Wie wirkt sich der Klimawandel auf die Veränderungen in den Jahreszeiten – konkret auf Pflanzenwelt, Tiere, Landwirtschaft, Gewässer und Schnee – aus? In der Broschüre erläutern neuen Beiträge anhand von phänologischen Beobachtungen bei Pflanzen, Schnee und Nebel, die Freiwillige seit 1970 im Rahmen des BernClim Beobachtungsnetzes erheben. 16.10.2020 Open Access ist ganz einfach ein Muss Das wissenschaftliche Publizieren befindet sich im Wandel. Spätestens seit Forschungsförderungsinstitutionen "Open Access" einfordern und Universitäten Repositorien eingerichtet haben, bewegt sich die Wissenschaft als Ganzes in Richtung Open Science. Im Bern "Open Science Blog" berichtet Stefan Brönnimann über seine Erfahrungen mit Open Access. 17.09.2020 New Topics for Bachelor and Master Theses The climatology group offers a number of interesting topics for Bachelor and Master theses. Have a look at the most recent list. 16.09.2020 New colloquium program now available Please note the new program of the Colloquium in Climatology, Climate Impact and Remote Sensing during autumn semester 2020. There will be many interesting talks and exciting discussions about various topics. Feel free to join the colloquium on Wednesdays at 14:15 in room 116, Mittelstrasse 43, or via Zoom according to the program. 26.06.2020 SRF-Beitrag zum Stadthitzemessnetz Das SRF-Wissenschaftsmagazin "Einstein" begleitete Doktorand Moritz Gubler und Masterstudent Moritz Burger beim Aufhängen der Sensoren für unsere diesjährige Messkampagne zur städtischen Hitzebelastung in Bern. Die Sendung thematisiert unterschiedliche Aspekte zum Thema "Urban Heating", wobei Messungen der kleinräumigen Variabilität der Lufttemperatur eine zentrale Rolle zur Validierung von Stadtklimamodellen sowie für die Planung, Umsetzung und das Monitoring von Massnahmen gegen die Stadthitze zukommt. 15.06.2020 Shifts in springs seasons after record low snow observations Analyses of the BernClim phenology observation network run by the climatology group reveals extreme observations for the last winter and spring season. For the first time on record, snow observations at the Lake of Thun left almost a blank observation sheet and only the last two days in February with snow on the ground according to the observations guide. Accordingly, the observer in the Emmental valley noted fewer than ten days with snow cover for the first time since starting the observations in the 1970s. Subsequently, plant development was up to one month earlier than the longterm mean for hazel and dandelion flowering. Fruit tree flowered about two weeks earlier than on average. These observations are in general agreement with Swiss observations from MeteoSwiss’ phenology network that shows an overall advancement of spring development of 11 days. Summer arrived with ripe strawberry and cherry fruit roughly one month ahead leading to the note of one observer: „Five summer months in Central Europe“. 22.05.2020 Stadthitze Messnetz wieder in Betrieb With the end of the Ice Saints, the hibernation of our urban heat measuring network has also come to an end: Once more, 65 temperature loggers are in use to track the heat load of the city of Bern. After two successful measurement campaigns with several intense heat waves, our extensive measurement network is now in use for the third year in a row. We are looking forward to the exciting insights, hypotheses, and surprises that the summer 2020 will bring! Mit dem Ende der Eisheiligen endet auch der Winterschlaf unseres Stadthitze-Messnetzes: Auch dieses Jahr sind wieder 65 Temperaturlogger im Einsatz, um der Hitzebelastung der Stadt Bern auf die Spur zu kommen. Nach zwei erfolgreichen Messkampagnen mit intensiven Hitzewellen ist unser umfangreiches Messnetz nun bereits das dritte Jahr in Folge im Einsatz. Wir sind gespannt, welche spannenden Erkenntnisse, Hypothesen und Überraschungen der Sommer 2020 bereithält! 04.05.2020 Historical weather diaries as a basis for climate research Historical weather observations help to understand atmospheric processes behind weather and climate events. The weather diary of the Kirch family from Berlin covers almost a century and provides the basis for the longest measurement series in Germany. In his Sabbatical, Stefan Brönnimann photographed the diary in Berlin. In this video he explains his work. 08.04.2020 Marie Curie Fellow: Andrew Friedman Dr. Andrew Friedman will join the climatology group with a prestigious Marie-Skłodovska Curie individual fellowship. Global warming is projected to have pronounced impacts on the hydroclimate — including rainfall and river flow — in the tropical Atlantic basin, which contains the world’s largest river systems and rainforests, and growing populations. The project “AQUATIC” (Assessing and QUantifying the ATlantic Instrumental hydroclimate) will compile recently-recovered measurements of precipitation, river discharge, and surface salinity from different archival sources to develop an integrated record of tropical Atlantic regional hydroclimate back to the late 19th century. The historical data will contribute to an understanding of the mechanisms of hydroclimate variability and constrain future climate projections. 01.04.2020 New Project "Weather Reconstruction" On 1 April, a new SNF project started in the climatology group. The project "Weather Reconstruction" (WeaR) aims at studying climatic anomalies during the last 350 years from a daily weather perspective. This includes sequences of dry summers, such as around 1800, as well as cold winters, such as 1708/9, which will be put in the context of atmospheric circulation. Using historical instrumental and documentary data, combined with analog reconstruction techniques and machine learning approaches, WeaR will produce daily weather reconstructions for central Europe back to the late 17th century. It draws from the recently finished SNF projects CHIMES and REUSE and supplements the ERC-Project PALAEO-RA by adding the daily scale to their monthly reconstructions. Furthermore, simulations with the regional model WRF will be performed to better understand extreme events. Noemi Imfeld, Lucas Pfister, and Peter Stucki will be the main researchers working on the project, which will last four years. 16.03.2020 Cancelled: Colloquium in Climatology, Climate Impact and Remote Sensing Due to the current situation we unfortunately have to cancel the colloquium of this spring semester 2020. Instead of the upcoming talks we provide a collection of E-Learning tools and presentations on our website. We are also happy to add (former) presentations of the planned speakers to this collection, if they wish to share them with us. We are sorry for the inconvenience and thank you for your understanding. 02.03.2020 Swiss historical meteorological records Did you know that in Switzerland, prior to the start of MeteoSwiss in 1863, over 330 meteorological records from over 200 locations were measured? Within the successfully concluded project CHIMES (funded by the Swiss National Science Foundation) and the ongoing projects "Long Meteorological Series" (GCOS) and PALAEO-RA (ERC), these measurements were rescued. A detailed inventory was produced and imaged data sheets and the digitised data were published in public repositories. A first series of papers, most of them written by students, is now published in "Geographica Bernensia". Each paper describes the historical information on one of the series. A second series of papers on further series will follow. These data will form the basis for a daily weather reconstructions of the past centuries and for the generation of a set of ca. 10 long homogenised Swiss series. 27.02.2020 "Beiträge zur Klimatologischen Grundlagenforschung" neu veröffentlicht Zwischen 1970 und 1987 erschien am Geographischen Institut im Selbstverlag die Schriftenreihe "Beiträge zur Klimatologischen Grundlagenforschung". Sie zeugt von den Ursprüngen der Klimaforschung am Institut. Die klingenden Namen der Autoren - Heinz Wanner, François Jeanneret, Bruno Messerli, Christian Pfister, Matthias Winiger - und die vielversprechenden Titel der Artikel - „Klima und Planung“, „Luft- und Satellitenbilder als mögliche Datenquellen bei der Schneekartierung“, „Klima, Phänologie und Mensch“, „Verteilung der Spätfrostschäden“, oder „Die Klimageschichte – eine vergessene Wissenschaft?“ - haben auch heute nichts an Aktualität verloren. Die Schriftenreihe wurde eingescannt und ist jetzt online verfügbar. 13.02.2020 New C3S Data Rescue Portal A wealth of old climate records still only exist in original form, such as paper or tape, and are at risk of being lost; the process of making these observations usable in digital form is called ‘data rescue’. Even small amounts of rescued data can make a big difference; filling in a gap in the records often opens up whole new avenues to explore. That is why the Copernicus Climate Change Service (C3S) has launched a new Data Rescue Portal. The Portal is part of a wider project which aims to make historical observations available via the Climate Data Store. Ultimately, C3S’s goal is to combine assets from archives all around the world to make one comprehensive dataset that anyone can use, containing every single observation that has ever been found anywhere. The new Portal has been developed in collaboration with a consortium that includes Stefan Brönnimann and Yuri Brugnara representing the University of Bern. Press Release: https://climate.copernicus.eu/new-portal-allows-sharing-historical-weather-observations-climate-research 13.01.2020 A treasure much bigger than previously thought New numerical methods can make use even of short meteorological measurement series to produce global weather reconstructions far back in time. These short records have not received much attention so far. According to a study led by Stefan Brönnimann and published in the "Bulletin of the American Meteorological Society", there are thousands of such records in archives and libraries worldwide prior to the start of National Weather Services, enabling new insights from past weather. Media Information.pdf (PDF, 256KB) 07.01.2020 Two types of North American droughts related to different atmospheric circulation patterns The western USA is frequently affected by multi-annual summer droughts. They can be separated into two groups with distinct spatial patterns, often termed Dust Bowl-type droughts and 1950s-type droughts. A recently published study by Angela-Maria Burgdorf, Stefan Brönnimann and Jörg Franke of the PALAEO-RA group analyzes the atmospheric circulation during these multi-annual drought events in EKF400, a novel global monthly three-dimensional reconstruction of the atmosphere back to 1600. Results confirm the two distinct drought types and show that they differ with respect to atmospheric circulation as well as sea surface temperatures. These insights may be useful in the context of drought prediction and analysis. The paper was highlighted by the journal and published on December 19, 2019, in “Climate of the Past”.