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By Richard Allan In our new research we have traced large and long-standing biases in computer simulations of climate, affecting the tempestuous Southern Ocean, to errors in cloud that emerge rapidly within the atmospheric models. Biases evolve over time through knock on effects that shift the location of the battering winds known as the Roaring 40s.
Our new method combines detailed computer simulations with observations of energy exchanged between the oceans and atmosphere that allowed us to better understand how deficiencies in climate models emerge in this key region for climate. This offers a route to improve the complex simulations necessary to make reliable climate change projections of the future.
The Southern Ocean is a pivotal component of the global climate system yet it is poorly represented in climate simulations, with significant biases in upper-ocean temperatures, clouds and winds. It plays an important role in the uptake of excess heat and carbon dioxide generated through human activities.
However most coupled atmosphere-ocean climate models have substantial warm biases in Southern Ocean Sea Surface Temperature SST see Figure 1 that have been linked to a lack of reflective super-cooled liquid water clouds in simulations.
Our work has helped to elucidate the link back from the SST biases to cloud-related errors in absorbed sunlight and we identified a slower response of the region of intense winds affecting the Southern Ocean that further modify the biases.
In our study we find that coupled climate simulations with warm biases in the Southern Ocean also receive too much heat flux at the surface in simulations using just the atmospheric part of the model Figure 1.
This suggests deficiencies that develop rapidly in the atmosphere are strongly linked with the long-term climatological bias in the simulations.
Further analysis identified that too much sunlight due to unrealistic cloud is primarily to blame, consistent with previous research. We attempted to summarise the main points in a schematic where we assume SST biases are linked to the energy budget of the upper mixed layer of the ocean as similarly applied in studies understanding ocean temperature variability.
This offers a route to further improve the climate model simulations that are vital in providing realistic projections of how climate will change over the coming decades.
The detailed research is available as an open access research paper in Nature Communications.Email to friends Share on Facebook - opens in a new window or tab Share on Twitter - opens in a new window or tab Share on Pinterest - opens in a new window or tabSeller Rating: % positive.
Roaring in the clouds () for Trombone and Percussion, commissioned by Rikskonserter (Swedish Concert Institute) for Axelsson & Nilsson Duo.
Welcome to Roaring Brook Nurseries We are a family owned and operated farm located in the scenic countryside of Wales, Maine. For the past 50 years we have been growing quality Maine Grown trees and shrubs for both the wholesale and retail markets.
Roaring bitmaps are compressed bitmaps. They can be hundreds of times faster. Grab one of our research papers Roaring Bitmaps on GitHub. Widely used. Cloud Torrent, Whoosh, InfluxDB, Pilosa, Bleve, Microsoft Visual Studio Team Services (VSTS), Intel’s Optimized Analytics Package (OAP), Tablesaw, Jive Miru.
Aristophanes, Clouds ff (trans. O'Neill) (Greek comedy C5th to 4th B.C.): "[In Aristophanes' comedy the Clouds, Sokrates (Socrates) declares that the Nephelai (Clouds) are the greatest of the gods:] Sokrates (Socrates): Give heed to the prayers.
Jul 17, · Reader photos: Roaring waterfall, angry clouds, more. We asked for your photos, and you shared them! Here's a roundup of our best reader photos today.