Grit Kirches

ORCID: 0000-0003-2805-5698
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About
Contact & Profiles
Research Areas
  • Remote Sensing in Agriculture
  • Land Use and Ecosystem Services
  • Atmospheric and Environmental Gas Dynamics
  • Species Distribution and Climate Change
  • Remote Sensing and Land Use
  • Remote-Sensing Image Classification
  • Climate variability and models
  • Geology and Paleoclimatology Research
  • Atmospheric chemistry and aerosols
  • Flood Risk Assessment and Management
  • Atmospheric aerosols and clouds
  • Geophysics and Gravity Measurements
  • Plant Water Relations and Carbon Dynamics
  • Oceanographic and Atmospheric Processes
  • Meteorological Phenomena and Simulations
  • Fire effects on ecosystems
  • Calibration and Measurement Techniques
  • Space exploration and regulation
  • Radiomics and Machine Learning in Medical Imaging
  • Cryospheric studies and observations
  • Aeolian processes and effects
  • Soil and Land Suitability Analysis
  • Urban Heat Island Mitigation
  • Climate change and permafrost
  • Remote Sensing and LiDAR Applications

Brockmann Consult (Germany)
2015-2023

Abstract. Global land cover is a key variable in the earth system with feedbacks on climate, biodiversity and natural resources. However, global data sets presently fall short of user needs providing detailed spatial thematic information that consistently mapped over time easily transferable to requirements models. In 2009, European Space Agency launched Climate Change Initiative (CCI), (LC_CCI) as 1 13 essential climate variables targeted for research development. The LC_CCI was implemented...

10.5194/gmd-8-2315-2015 article EN cc-by Geoscientific model development 2015-07-31

The Atmospheric Correction Inter-comparison eXercise (ACIX) is an international initiative with the aim to analyse Surface Reflectance (SR) products of various state-of-the-art atmospheric correction (AC) processors. Aerosol Optical Thickness (AOT) and Water Vapour (WV) are also examined in ACIX as additional outputs AC processing. In this paper, general framework discussed; special mention made motivation initiate experiment, inter-comparison protocol, principal results. free open every...

10.3390/rs10020352 article EN cc-by Remote Sensing 2018-02-24

Abstract. The existing medium-resolution land cover time series produced under the European Space Agency's Climate Change Initiative provides 29 years (1992–2020) of annual maps at 300 m resolution, allowing for a detailed study change dynamics over contemporary era. Because models need two-dimensional parameters rather than information, classes must be converted into model-appropriate plant functional types (PFTs) to apply this Earth system and surface models. first-generation cross-walking...

10.5194/essd-15-1465-2023 article EN cc-by Earth system science data 2023-03-31

Coarse resolution sensors are not very sensitive at detecting small fire patches, making current estimations of global burned areas (BA) conservative. Using medium or high-resolution to generate BA products becomes then a priority, particularly in where fires tend be and frequent. Building on previous work that developed dataset (SFD) for Sub-Saharan Africa 2016, this paper presents new version the 2019 using two Sentinel-2 satellites (A B) VIIRS active fires. Total estimated was 4.8 Mkm2....

10.1016/j.scitotenv.2022.157139 article EN cc-by-nc The Science of The Total Environment 2022-07-09

Abstract. Essential Climate Variables were listed by the Global Observing System as critical information to further understand climate system and support modelling. The European Space Agency launched its Change Initiative in order provide an adequate response set of requirements for long-term satellite-based products climate. Within this program, CCI Land Cover project aims at revisiting all algorithms required generation global land cover that are stable consistent over time, while also...

10.5194/isprsarchives-xl-7-w3-323-2015 article EN cc-by ˜The œinternational archives of the photogrammetry, remote sensing and spatial information sciences/International archives of the photogrammetry, remote sensing and spatial information sciences 2015-04-29

This article presents the burned area (BA) product of Copernicus Climate Change Service (C3S) European Commission. product, named C3SBA10, is based on adaptation to Sentinel-3 OLCI images a BA algorithm developed within Fire Initiative (FireCCI) project, which used MODIS data. We first reviewed process and then analysed results both products for common years (2017–2019). Comparisons were performed using four different grid sizes (0.05°, 0.10°, 0.25°, 0.50°). Annual correlations between two...

10.3390/rs13214295 article EN cc-by Remote Sensing 2021-10-26

The existing CCI Medium Resolution land cover (MRLC) product delineates 22 primary and 15 secondary classes at 300-meter resolution with global coverage an annual time step extending from 1992 to the present. Previously, translation of into plant functional types (PFTs) used by Earth system surface models required use cross-walking table that defines, for each class, invariant PFT fractional composition every pixel class regardless geographic location. Here, we present a new series data...

10.5194/egusphere-egu23-16740 preprint EN 2023-02-26

Earth Observation satellite data allows for the monitoring of surface our planet at predefined intervals covering large areas. However, there is only one medium resolution sensor family in orbit that enables an observation time span 40 and more years a daily repeat interval. This AVHRR family. If we want to investigate long-term impacts climate change on environment, can do so based remains available several decades. then processes with respect change, need very high temporal enabling...

10.3390/rs13183618 article EN cc-by Remote Sensing 2021-09-10

Abstract. Global land cover is a key variable in the earth system with feedbacks on climate, biodiversity and natural resources. However, global land-cover datasets presently fall short of user needs providing detailed spatial thematic information that consistently mapped over time easily transferable to requirements models. In 2009, European Space Agency launched Climate Change Initiative (CCI), (LC_CCI) as one thirteen Essential Variables targeted for research development. The LC_CCI was...

10.5194/gmdd-8-429-2015 preprint EN cc-by 2015-01-21

In the framework of European Copernicus programme, Space Agency (ESA) has launched Sentinel-2 (S2) Earth Observation (EO) mission which provides optical high spatial resolution imagery over land and coastal areas. As part this mission, a tool (named S2-RUT, from Radiometric Uncertainty Tool) been developed. The estimates radiometric uncertainty associated with each pixel in top-of-atmosphere (TOA) reflectance factor images provided by ESA. This paper describes design development process...

10.3390/rs9020178 article EN cc-by Remote Sensing 2017-02-21

Abstract. This paper presents a new global, operational burned area (BA) product at 300 m, called C3SBA10, generated from Sentinel-3 Ocean and Land Colour Instrument (OLCI) near-infrared (NIR) reflectance Moderate Resolution Imaging Spectroradiometer (MODIS) thermal anomaly data. was within the Copernicus Climate Change Service (C3S). Since C3S is European service, it aims to use extensively satellite missions, named Sentinels. Therefore, one of components service adapting previous developed...

10.5194/essd-2020-399 article EN cc-by 2021-01-14

Abstract. The existing medium-resolution land cover time series produced under the European Space Agency's Climate Change Initiative provides 29 years (1992–2020) of annual maps at 300-m resolution, allowing for a detailed study change dynamics over contemporary era. Because models need 2D parameters rather than information, classes must be converted into model-appropriate plant functional types (PFTs) to apply this Earth system and surface models. first generation cross-walking table that...

10.5194/essd-2022-296 preprint EN cc-by 2022-09-16

This paper discusses results from 12 months of a Round Robin exercise aimed at the inter-comparison different cloud detection algorithms for Proba-V. Clouds is critical issue satellite optical remote sensing, since potential errors in masking directly translates into significant uncertainty retrieved downstream geophysical products. Cloud particularly challenging Proba-V due to presence limited number spectral bands and lack thermal infrared bands. The main objective project was several over...

10.1109/multi-temp.2017.8035219 article EN 2017-06-01

PROBA-V (PRoject for On-Board Autonomy–Vegetation) was launched in May-2013 as an operational continuation to the vegetation (VGT) instruments on-board Système Pour l’Observation de la Terre (SPOT)-4 and -5 satellites. The first reprocessing campaign of archive from Collection 0 (C0) 1 (C1) aims at harmonizing time series, thanks improved radiometric geometric calibration cloud detection. evaluation C1 focuses on (i) qualitative quantitative assessment new detection scheme; (ii)...

10.3390/rs10091375 article EN cc-by Remote Sensing 2018-08-30

<p>The CISAR (Combined Inversion of Surface and AeRosols) algorithm is exploited in the framework ESA-SEOM CIRCAS (ConsIstent Retrieval Cloud Aerosol Surface) project, aiming at providing a set atmospheric (cloud aerosol) surface reflectance products derived from S3A/SLSTR observations using same radiative transfer physics assumptions. an advance developed by Rayference originally designed for retrieval aerosol single scattering properties both geostationary polar orbiting...

10.5194/egusphere-egu2020-16090 preprint EN 2020-03-10
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