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Wang, Shiyu
Publikasjoner (7 av 7) Visa alla publikasjoner
Thomas, M., Devasthale, A., L'Ecuyer, T., Wang, S., Koenigk, T. & Wyser, K. (2019). Snowfall distribution and its response to the Arctic Oscillation: an evaluation of HighResMIP models in the Arctic using CPR/CloudSat observations. Geoscientific Model Development, 12(8), 3759-3772
Åpne denne publikasjonen i ny fane eller vindu >>Snowfall distribution and its response to the Arctic Oscillation: an evaluation of HighResMIP models in the Arctic using CPR/CloudSat observations
Vise andre…
2019 (engelsk)Inngår i: Geoscientific Model Development, ISSN 1991-959X, E-ISSN 1991-9603, Vol. 12, nr 8, s. 3759-3772Artikkel i tidsskrift (Fagfellevurdert) Published
HSV kategori
Forskningsprogram
Klimat
Identifikatorer
urn:nbn:se:smhi:diva-5414 (URN)10.5194/gmd-12-3759-2019 (DOI)000483069400001 ()
Tilgjengelig fra: 2019-09-18 Laget: 2019-09-18 Sist oppdatert: 2019-09-18bibliografisk kontrollert
Dieterich, C., Wang, S., Schimanke, S., Groger, M., Klein, B., Hordoir, R., . . . Meier, M. (2019). Surface Heat Budget over the North Sea in Climate Change Simulations. Atmosphere, 10(5), Article ID 272.
Åpne denne publikasjonen i ny fane eller vindu >>Surface Heat Budget over the North Sea in Climate Change Simulations
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2019 (engelsk)Inngår i: Atmosphere, ISSN 2073-4433, E-ISSN 2073-4433, Vol. 10, nr 5, artikkel-id 272Artikkel i tidsskrift (Fagfellevurdert) Published
HSV kategori
Forskningsprogram
Oceanografi
Identifikatorer
urn:nbn:se:smhi:diva-5253 (URN)10.3390/atmos10050272 (DOI)000472677600046 ()
Tilgjengelig fra: 2019-07-29 Laget: 2019-07-29 Sist oppdatert: 2019-07-29bibliografisk kontrollert
Lauer, A., Jones, C., Eyring, V., Evaldsson, M., Stefan, H. A., Makela, J., . . . Wang, S. (2018). Process-level improvements in CMIP5 models and their impact on tropical variability, the Southern Ocean, and monsoons. Earth System Dynamics, 9(1), 33-67
Åpne denne publikasjonen i ny fane eller vindu >>Process-level improvements in CMIP5 models and their impact on tropical variability, the Southern Ocean, and monsoons
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2018 (engelsk)Inngår i: Earth System Dynamics, ISSN 2190-4979, E-ISSN 2190-4987, Vol. 9, nr 1, s. 33-67Artikkel i tidsskrift (Fagfellevurdert) Published
HSV kategori
Forskningsprogram
Klimat
Identifikatorer
urn:nbn:se:smhi:diva-4484 (URN)10.5194/esd-9-33-2018 (DOI)000422815600001 ()
Tilgjengelig fra: 2018-01-29 Laget: 2018-01-29 Sist oppdatert: 2018-01-29bibliografisk kontrollert
Eyring, V., Righi, M., Lauer, A., Evaldsson, M., Wenzel, S., Jones, C., . . . Williams, K. D. (2016). ESMValTool (v1.0) - a community diagnostic and performance metrics tool for routine evaluation of Earth system models in CMIP. Geoscientific Model Development, 9(5), 1747-1802
Åpne denne publikasjonen i ny fane eller vindu >>ESMValTool (v1.0) - a community diagnostic and performance metrics tool for routine evaluation of Earth system models in CMIP
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2016 (engelsk)Inngår i: Geoscientific Model Development, ISSN 1991-959X, E-ISSN 1991-9603, Vol. 9, nr 5, s. 1747-1802Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A community diagnostics and performance metrics tool for the evaluation of Earth system models (ESMs) has been developed that allows for routine comparison of single or multiple models, either against predecessor versions or against observations. The priority of the effort so far has been to target specific scientific themes focusing on selected essential climate variables (ECVs), a range of known systematic biases common to ESMs, such as coupled tropical climate variability, monsoons, Southern Ocean processes, continental dry biases, and soil hydrology-climate interactions, as well as atmospheric CO2 budgets, tropospheric and stratospheric ozone, and tropospheric aerosols. The tool is being developed in such a way that additional analyses can easily be added. A set of standard namelists for each scientific topic reproduces specific sets of diagnostics or performance metrics that have demonstrated their importance in ESM evaluation in the peer-reviewed literature. The Earth System Model Evaluation Tool (ESMValTool) is a community effort open to both users and developers encouraging open exchange of diagnostic source code and evaluation results from the Coupled Model Intercomparison Project (CMIP) ensemble. This will facilitate and improve ESM evaluation beyond the state-of-the-art and aims at supporting such activities within CMIP and at individual modelling centres. Ultimately, we envisage running the ESMValTool alongside the Earth System Grid Federation (ESGF) as part of a more routine evaluation of CMIP model simulations while utilizing observations available in standard formats (obs4MIPs) or provided by the user.

HSV kategori
Forskningsprogram
Klimat
Identifikatorer
urn:nbn:se:smhi:diva-2198 (URN)10.5194/gmd-9-1747-2016 (DOI)000376937800006 ()
Tilgjengelig fra: 2016-07-08 Laget: 2016-07-08 Sist oppdatert: 2017-11-28bibliografisk kontrollert
Wang, S., Dieterich, C., Doescher, R., Höglund, A., Hordoir, R., Meier, M., . . . Schimanke, S. (2015). Development and evaluation of a new regional coupled atmosphere-ocean model in the North Sea and Baltic Sea. Tellus. Series A, Dynamic meteorology and oceanography, 67, Article ID 24284.
Åpne denne publikasjonen i ny fane eller vindu >>Development and evaluation of a new regional coupled atmosphere-ocean model in the North Sea and Baltic Sea
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2015 (engelsk)Inngår i: Tellus. Series A, Dynamic meteorology and oceanography, ISSN 0280-6495, E-ISSN 1600-0870, Vol. 67, artikkel-id 24284Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A new regional coupled model system for the North Sea and the Baltic Sea is developed, which is composed of the regional setup of ocean model NEMO, the Rossby Centre regional climate model RCA4, the sea ice model LIM3 and the river routing model CaMa-Flood. The performance of this coupled model system is assessed using a simulation forced with ERA-Interim reanalysis data at the lateral boundaries during the period 1979-2010. Compared to observations, this coupled model system can realistically simulate the present climate. Since the active coupling area covers the North Sea and Baltic Sea only, the impact of the ocean on the atmosphere over Europe is small. However, we found some local, statistically significant impacts on surface parameters like 2m air temperature and sea surface temperature (SST). A precipitation-SST correlation analysis indicates that both coupled and uncoupled models can reproduce the air-sea relationship reasonably well. However, the coupled simulation gives slightly better correlations even when all seasons are taken into account. The seasonal correlation analysis shows that the air-sea interaction has a strong seasonal dependence. Strongest discrepancies between the coupled and the uncoupled simulations occur during summer. Due to lack of air-sea interaction, in the Baltic Sea in the uncoupled atmosphere-standalone run the correlation between precipitation and SST is too small compared to observations, whereas the coupled run is more realistic. Further, the correlation analysis between heat flux components and SST tendency suggests that the coupled model has a stronger correlation. Our analyses show that this coupled model system is stable and suitable for different climate change studies.

HSV kategori
Forskningsprogram
Oceanografi
Identifikatorer
urn:nbn:se:smhi:diva-1928 (URN)10.3402/tellusa.v67.24284 (DOI)000369824300001 ()
Tilgjengelig fra: 2016-05-02 Laget: 2016-03-03 Sist oppdatert: 2018-01-10bibliografisk kontrollert
Dieterich, C., Schimanke, S., Wang, S., Väli, G., Liu, Y., Hordoir, R., . . . Meier, M. (2013). Evaluation of the SMHI coupled atmosphere-ice-ocean model RCA4-NEMO. SMHI
Åpne denne publikasjonen i ny fane eller vindu >>Evaluation of the SMHI coupled atmosphere-ice-ocean model RCA4-NEMO
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2013 (engelsk)Rapport (Annet vitenskapelig)
Abstract [sv]

Den regionala kopplade atmosfär-is-havsmodellen RCA4-NEMO som utvecklats vid SMHI, utvärderas baserat på en ERA40-återanalys. Utvecklingen av den regionala klimatmodellen fortsätter men en första utvärdering presenteras här för att informera om aktuell status.RCA4-NEMO i aktuell status innehåller två modellkomponenter. Den regionala atmosfärsmodellen RCA4 täcker hela Europa och är tvåvägskopplad till en is-hav-modell för Nordsjön och Östersjön baserat på NEMO. Den används för tillfället för nedskalning av CMIP5-scenarier för detta århundrade för Nordsjön och Östersjön. Som en del av utvärderingen av RCA4-NEMO presenteras en analys och diskussion av hindcast-körning 1970-1999. Modellresulaten jämförs med observationsdata. Temperatur nära ytan och värmeflödet är förhållandevis bra vid en jämförelse med in-situ-mätningar och skattningar baserade på satellitdata. Salthalt och färskvattenutbyte är dock mindre bra. Momentumflödet från atmosfär till hav identifieras som en kritisk process i kopplingen mellan modellerna. Med undantag för färskvattensutbytet mellan atmosfär och hav är de klimatologiska egenskaperna nära ytan och motsvarande flöden jämförbara med klimatologiska observationer för perioden 1970-1999.

Abstract [en]

AbstractThe regional, coupled atmosphere-ice-ocean model RCA4-NEMO developed at the SMHI is evaluated on the basis of an ERA40 hindcast. While the development of the regional climate model is continuing a first assessment is presented here to allow for an orientation about the status guo. RCA4-NEMO in its present form consists of two model components. The regional atmosphere model RCA4 covers the whole of Europe and is interactvely coupled to a North Sea and Baltic Sea ice-ocean model based on NEMO. RCA4-NEMO is currently being used to downscale CMIP5 scenarios for the North Sea and Baltic Sea region for this century. As a part of the validation of RCA4-NEMO we present an analysis and discussion of the hindcast period 1970-1999. The model realization is compared to observational records. Near surface temperatures and heat fluxes compare reasonably well with records of in-situ measurments and satellite derived estimates. For salinities and freshwater fluxes the agreement with observations in not satisfactory yet. The momentum fluxes transferred from the atmosphere to the ice-ocean model are identified as on of the sensitive processes in the coupling of both model components. Except for the freshwater exchange between atmosphere and ocean the climatological near surface properties and corresponding fluxes compare well with climatological estimates for the period 1970-1999.

sted, utgiver, år, opplag, sider
SMHI, 2013. s. 80
Serie
RO, Rapport Oceanografi, ISSN 0283-1112 ; 47
Emneord
RCA4-NEMO, coupled, regional, climate, atmosphere-ice-ocean, model, RCM, North Sea, Baltic Sea, ERA40, hindcast, simulation, response, Search and rescue
Identifikatorer
urn:nbn:se:smhi:diva-2623 (URN)Oceanografi, Rapporter, Serie RO (Lokal ID)Oceanografi, Rapporter, Serie RO (Arkivnummer)Oceanografi, Rapporter, Serie RO (OAI)
Tilgjengelig fra: 2013-02-25 Laget: 2016-07-08 Sist oppdatert: 2016-07-08bibliografisk kontrollert
Semmler, T., McGrath, R. & Wang, S. (2012). The impact of Arctic sea ice on the Arctic energy budget and on the climate of the Northern mid-latitudes. Climate Dynamics, 39(11), 2675-2694
Åpne denne publikasjonen i ny fane eller vindu >>The impact of Arctic sea ice on the Arctic energy budget and on the climate of the Northern mid-latitudes
2012 (engelsk)Inngår i: Climate Dynamics, ISSN 0930-7575, E-ISSN 1432-0894, Vol. 39, nr 11, s. 2675-2694Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The atmospheric general circulation model EC-EARTH-IFS has been applied to investigate the influence of both a reduced and a removed Arctic sea ice cover on the Arctic energy budget and on the climate of the Northern mid-latitudes. Three 40-year simulations driven by original and modified ERA-40 sea surface temperatures and sea ice concentrations have been performed at T255L62 resolution, corresponding to 79 km horizontal resolution. Simulated changes between sensitivity and reference experiments are most pronounced over the Arctic itself where the reduced or removed sea ice leads to strongly increased upward heat and longwave radiation fluxes and precipitation in winter. In summer, the most pronounced change is the stronger absorption of shortwave radiation which is enhanced by optically thinner clouds. Averaged over the year and over the area north of 70 degrees N, the negative energy imbalance at the top of the atmosphere decreases by about 10 W/m(2) in both sensitivity experiments. The energy transport across 70 degrees N is reduced. Changes are not restricted to the Arctic. Less extreme cold events and less precipitation are simulated in sub-Arctic and Northern mid-latitude regions in winter.

HSV kategori
Forskningsprogram
Klimat
Identifikatorer
urn:nbn:se:smhi:diva-429 (URN)10.1007/s00382-012-1353-9 (DOI)000310870200005 ()
Tilgjengelig fra: 2015-04-21 Laget: 2015-04-14 Sist oppdatert: 2017-12-04bibliografisk kontrollert
Organisasjoner
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