The purpose of this paper is to establish user requirements relevant to a cloud, precipitation and large scale land surface imaging (CPL) mission in the time frame of the post EPS mission (2020 onwards). The requirements presented in this paper are based on user needs alone and are independent of current technological constraints. Focus is on future expectations for areas from which improvements in the availability and/or quality, of specific observations would lead to substantial improvements in forecasts. Expertise from a variety of communities has been drawn upon in order to generate user needs expressed in terms of geophysical variables, for meteorological applications including numerical weather prediction (NWP) and nowcasting (NWC), and for hydrology and climate. Current trends in the evolution of these applications are considered in order to derive the necessary satellite products that will be required for these applications in the future. In the post EPS time frame the increased sensitivity of weather due to climate change will place increasing demands on the description and prediction of extreme meteorological events. In addition, models will be required to branch out to encompass domains other than short-medium term weather forecasting such as air quality monitoring, seasonal and inter-annual forecasts and climate change detection. The increasing complexity of models particularly with regard to parameterisation and data assimilation schemes, along with the underlying trend towards coupled atmosphere, ocean and land models, generates the need for a more ambitious, but nevertheless high quality, set of satellite derived products. The manifestation of these trends within the scope of the CPL mission introduces new requirements for geophysical products, particularly in the domains of land surface parameterisation and the microphysical analysis of cloud, precipitation and aerosols. To a first iteration, detailed user requirements for global (Eyre et al. 2002) and regional (Gustafsson et al. 2001) numerical weather prediction (NWP) and nowcasting (NWC) (Golding et al. 2003) were obtained from the Meteosat Third Generation (MTG) definition process. These requirements were further built upon to focus on LEO capabilities and to introduce requirements relevant for climate monitoring and hydrology. The CPL mission, that considers clouds, precipitation, aerosol, atmospheric radiation, soil parameters, vegetation, snow, fire, is by far a multi-purpose mission. We have identified the physical effects as the key to rate priorities in the CPL list and this choice has permitted the identification the parameters that control energy and water transformation in the body of the atmosphere and to rate land surface parameters by identifying those that more control energy and water input into the atmosphere. Priorities have been defined from the consideration that a LEO mission serves both as a global mission and a regional mission at high latitudes (HL), where a constellation of LEO can provide adequate sampling in time for regional NWP and NWC. The use of cloud, precipitation and land-imaging data into global and regional NWP, NWC applications has made substantial progress since 2001 (the time at which the MTG requirements were generated), which needs to be reflected by updated requirements. The AEG has adopted a position that although the MTG requirements formed a very good baseline, the modifications proposed in this paper are conservative, achievable and appropriate, particularly in view of some inconsistencies and omissions in the MTG and WMO requirements for these relatively immature observations. Significant modifications with respect to the MTG requirements baseline are addressed and justified in this paper.

Cloud, Precipitation and Large Scale Land Surface Imaging (CPL) Observational Requirements for Meteorology, Hydrology and Climate / R. Rizzi; P. Bauer; S. Crewell; M. Leroy; C. Mätzler; W. P. Menzel; B. Ritter; J.E. Russell; A. Thoss. - (2006).

Cloud, Precipitation and Large Scale Land Surface Imaging (CPL) Observational Requirements for Meteorology, Hydrology and Climate

RIZZI, ROLANDO;
2006

Abstract

The purpose of this paper is to establish user requirements relevant to a cloud, precipitation and large scale land surface imaging (CPL) mission in the time frame of the post EPS mission (2020 onwards). The requirements presented in this paper are based on user needs alone and are independent of current technological constraints. Focus is on future expectations for areas from which improvements in the availability and/or quality, of specific observations would lead to substantial improvements in forecasts. Expertise from a variety of communities has been drawn upon in order to generate user needs expressed in terms of geophysical variables, for meteorological applications including numerical weather prediction (NWP) and nowcasting (NWC), and for hydrology and climate. Current trends in the evolution of these applications are considered in order to derive the necessary satellite products that will be required for these applications in the future. In the post EPS time frame the increased sensitivity of weather due to climate change will place increasing demands on the description and prediction of extreme meteorological events. In addition, models will be required to branch out to encompass domains other than short-medium term weather forecasting such as air quality monitoring, seasonal and inter-annual forecasts and climate change detection. The increasing complexity of models particularly with regard to parameterisation and data assimilation schemes, along with the underlying trend towards coupled atmosphere, ocean and land models, generates the need for a more ambitious, but nevertheless high quality, set of satellite derived products. The manifestation of these trends within the scope of the CPL mission introduces new requirements for geophysical products, particularly in the domains of land surface parameterisation and the microphysical analysis of cloud, precipitation and aerosols. To a first iteration, detailed user requirements for global (Eyre et al. 2002) and regional (Gustafsson et al. 2001) numerical weather prediction (NWP) and nowcasting (NWC) (Golding et al. 2003) were obtained from the Meteosat Third Generation (MTG) definition process. These requirements were further built upon to focus on LEO capabilities and to introduce requirements relevant for climate monitoring and hydrology. The CPL mission, that considers clouds, precipitation, aerosol, atmospheric radiation, soil parameters, vegetation, snow, fire, is by far a multi-purpose mission. We have identified the physical effects as the key to rate priorities in the CPL list and this choice has permitted the identification the parameters that control energy and water transformation in the body of the atmosphere and to rate land surface parameters by identifying those that more control energy and water input into the atmosphere. Priorities have been defined from the consideration that a LEO mission serves both as a global mission and a regional mission at high latitudes (HL), where a constellation of LEO can provide adequate sampling in time for regional NWP and NWC. The use of cloud, precipitation and land-imaging data into global and regional NWP, NWC applications has made substantial progress since 2001 (the time at which the MTG requirements were generated), which needs to be reflected by updated requirements. The AEG has adopted a position that although the MTG requirements formed a very good baseline, the modifications proposed in this paper are conservative, achievable and appropriate, particularly in view of some inconsistencies and omissions in the MTG and WMO requirements for these relatively immature observations. Significant modifications with respect to the MTG requirements baseline are addressed and justified in this paper.
2006
Cloud, Precipitation and Large Scale Land Surface Imaging (CPL) Observational Requirements for Meteorology, Hydrology and Climate / R. Rizzi; P. Bauer; S. Crewell; M. Leroy; C. Mätzler; W. P. Menzel; B. Ritter; J.E. Russell; A. Thoss. - (2006).
R. Rizzi; P. Bauer; S. Crewell; M. Leroy; C. Mätzler; W. P. Menzel; B. Ritter; J.E. Russell; A. Thoss
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/62725
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