FG Klimatologie

8 Items

Recent Submissions
Contrasting changes of urban heat island intensity during hot weather episodes

Fenner, Daniel ; Holtmann, Achim ; Meier, Fred ; Langer, Ines ; Scherer, Dieter (2019-11-27)

Cities typically exhibit higher air temperatures than their rural surroundings, a phenomenon known as the urban heat island (UHI) effect. Contrasting results are reported as to whether UHI intensity (UHII) is exacerbated or reduced during hot weather episodes (HWEs). This contrast is investigated for a four-year period from 2015 to 2018, utilising a set of observational data from high-quality m...

Prominent Midlatitude Circulation Signature in High Asia's Surface Climate During Monsoon

Mölg, Thomas ; Maussion, Fabien ; Collier, Emily ; Chiang, John H. C. ; Scherer, Dieter (2017-11-18)

High Asia has experienced strong environmental changes in recent decades, as evident in records of glaciers, lakes, tree rings, and vegetation. The multiscale understanding of the climatic drivers, however, is still incomplete. In particular, few systematic assessments have evaluated to what degree, if at all, the midlatitude westerly circulation modifies local surface climates in the reach of ...

Occurrence and Coupling of Heat and Ozone Events and Their Relation to Mortality Rates in Berlin, Germany, between 2000 and 2014

Krug, Alexander ; Fenner, Daniel ; Holtmann, Achim ; Scherer, Dieter (2019-06-25)

Episodes of hot weather and poor air quality pose significant consequences for public health. In this study, these episodes are addressed by applying the observational data of daily air temperature and ozone concentrations in an event-based risk assessment approach in order to detect individual heat and ozone events, as well as events of their co-occurrence in Berlin, Germany, in the years 2000...

The Human Influence Experiment (Part 2): Guidelines for Improved Mapping of Local Climate Zones Using a Supervised Classification

Verdonck, Marie-leen ; Demuzere, Matthias ; Bechtel, Benjamin ; Beck, Christoph ; Brousse, Oscar ; Droste, Arjan ; Fenner, Daniel ; Leconte, François ; Van Coillie, Frieke (2019-02-28)

Since 2012, Local Climate Zones (LCZ) have been used for numerous studies related to urban environment. In 2015, this use amplified because a method to map urban areas in LCZs was introduced by the World Urban Database and Access Portal Tools (WUDAPT). However in 2017, the first HUMan INfluence EXperiment showed that these maps often have poor or low quality. Since the maps are used in differen...

Quality of Crowdsourced Data on Urban Morphology—The Human Influence Experiment (HUMINEX)

Bechtel, Benjamin ; Demuzere, Matthias ; Sismanidis, Panagiotis ; Fenner, Daniel ; Brousse, Oscar ; Beck, Christoph ; Van Coillie, Frieke ; Conrad, Olaf ; Keramitsoglou, Iphigenia ; Middel, Ariane ; Mills, Gerald ; Niyogi, Dev ; Otto, Marco ; See, Linda ; Verdonck, Marie-Leen (2017-05-09)

The World Urban Database and Access Portal Tools (WUDAPT) is a community initiative to collect worldwide data on urban form (i.e., morphology, materials) and function (i.e., use and metabolism). This is achieved through crowdsourcing, which we define here as the collection of data by a bounded crowd, composed of students. In this process, training data for the classification of urban structures...

Quality control for crowdsourced data from CWS

Grassmann, Tom ; Napoly, Adrien ; Meier, Fred ; Fenner, Daniel (2018)

This package performs a quality control (QC) and filters suspicious data from citizen weather stations (CWS). It was designed for hourly air temperature data from Netatmo stations but should work with any normally-distributed data.

Micro-scale variability of air temperature within a local climate zone in Berlin, Germany, during summer

Quanz, Justus A. ; Ulrich, Susanne ; Fenner, Daniel ; Holtmann, Achim ; Eimermacher, Jonas (2018)

The urban climate, especially the near-surface air temperature ( T ), is influenced to large amounts by urban surface properties on the local-scale. Landscape classification schemes, like the Local Climate Zone (LCZ) concept, classify neighbourhoods on this scale based on their surface properties, neglecting sub-scale heterogeneity in the urban structure and its potential effects on T . To quan...

Implications of atmospheric conditions for analysis of surface temperature variability derived from landscape-scale thermography

Hammerle, Albin ; Meier, Fred ; Heinl, Michael ; Egger, Angelika ; Leitinger, Georg (2016)

Thermal infrared (TIR) cameras perfectly bridge the gap between (i) on-site measurements of land surface temperature (LST) providing high temporal resolution at the cost of low spatial coverage and (ii) remotely sensed data from satellites that provide high spatial coverage at relatively low spatio-temporal resolution. While LST data from satellite (LSTsat) and airborne platforms are routinely ...