BSRN Value Added Products: Status and Perspectives 2024
"Explore the latest advancements in the Baseline Surface Radiation Network (BSRN) Value Added Products Working Group (VAP.WG) for 2024. Discover proposed and current achievements, operational parameters, and key considerations in the field of clear-sky id, radflux, and more. Stay informed on the BSRN community's expertise in creating Analysis Ready Data (ARD) and the ongoing efforts to enhance data quality and usability."
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Presentation Transcript
BSRN Value Added Products WG Status and perspectives 2024 Christian Lanconelli (BSRN) 18thBSRN Scientific review and Workshop, Tokyo, 1-5 July2024
Background Users may need accessing Analysis Ready Data (ARD) The wider BSRN community has the expertise to support the creation of such ARD
VAP WG Proposed in 2022 Clear-sky id: SW Swclridnc(z) & RadFlux; RadFluxSimp (Simplified version (SW glob only). LW APCADA, RadFlux Clear-sky fitting (SW & LW) All-sky Clear-sky Downwelling/Net CRE/CRF Temporal Aggregation (month) Representativeness indexes Gap filling Albedo
Current partial achievements Clear-sky id: SW Swclridnc(z) & RadFlux; RadFluxSimp (Simplified version (SW glob only). LW APCADA, RadFlux Clear-sky fitting (SW & LW) All-sky Clear-sky Downwelling/Net CRE/CRF Temporal Aggregation (month) Representativeness indexes Gap filling Albedo
Swclridnc[z] Operational (dt = 10 days, or on requests) A, b parameters produced over the whole archive Any new S2A file will be processed automatically Need for an assessment of clr-id performance, uncertainty of the clear-sky fit against clr-sky data (RMSE), cloud fraction estimation against skycam Comparison of Taerosol-gas and Tcloud, with AOD and cloud information wherever available Assessment of CRE (SW) and CRF (req upwelling comps) Daily and monthly averages
RadFlux[swclridnz+armswzcf+clr_lwdn2] Operated by CNR (others?) over Lin-2017 CF as derived from SW and LW highly correlated but biased A, b parameters coherent with the results obtained by Swclridnc To be extended to the whole archive (tuning of parameters) To be made operational Testing / Assessment of the products Daily and monthly averages
Baseline Surface Radiation Network: Time-aggregated products C3S2 311 Lot2 Second Annual Meeting Wien, 29 31 August 2023 Akanksha Balha (CNR-IMAA) Fabio Madonna (University of Salerno/CNR-IMAA) Christian Lanconelli (Uni Systems / EC JRC) Climate Change
Dataset for time-aggregation LR0100 only Based on a snapshot of the archive frozen to 2023- 03-31 and specifically dedicated to this effort contains precalculated quality flags (BSRN Toolbox) M7 Algorithm; Roesch et al., 2011 Expected within 2024
Representativeness index EC JRC Urraca presented a work a about spatial and temporal mismatches from 0.05 x0.05 products aimed to validate products such as SWD, CF Similar studies can be conducted to verify the Site representativeness for albedo CAL/VAL, or upwelling components using High Resolution datasets (Sentinel-2, Landsat)
Mismatch causes Cloud cover frequency (CF) variability (MODIS 1km) Main cause: cloud cover variability - r(spatial mismatch, CF variability) = 0.85 - r(temporal mismatch, CF variability) = 0.6
Way forward Scouting for BSRN members having a common interest about these tasks Previous experience with RadFlux codes Stakeholders (Remote sensing, climate models) J Trentmann, J Augustine, T Zhang, R Urraca, ... J Badosa, M Wild, M Hakuba, GDAP s members, S Kato, CERES, ... Assessment of ARD, self + peer-review, BSRN-ARD BSRN web To join VAP WG just e-mail me or Laura Contributors: me, Laura, C Frangipani, R Urraca, F Madonna, A Balha, V Vitale, J Augustine,
Mainreferences Long, CN, and TP Ackerman. 2000. Identification of clear skies from broadband pyranometer measurements and calculation of downwelling shortwave cloud effects. Journal of Geophysical Research Atmospheres 105(D12) 15609 15626. Riihimaki, Laura D, Gaustad, K L, and Long, Charles N. Radiative Flux Analysis (RADFLUXANAL) ValueAdded Product: Retrieval of Clear-Sky Broadband Radiative Fluxes and Other Derived Values. United States: N. p., 2019. Other resources: Long and Turner (JGR, 2008) D rr and Philipona (JGR, 2004) APCADA Duchon and O Malley code (JAM,1999): cloud type
