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Pages 110-117

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From page 110...
... This report highlights broad guidance on the key avenues of research that need to be pursued to better understand climate feedbacks and is intended to call attention to those areas where additional focus might be productive in the near term. The key finding of this report is that an enhanced research effort is needed to better observe, understand, and model key climate feedback processes.
From page 111...
... In addition to temperature and precipitation, variables such as clouds, water vapor, aerosols, land surface properties, snow cover, sea ice, and radiation budget quantities need to be monitored. Stable long-term measurements of these variables can be used to monitor the feedback processes, to better understand these processes, to identify the contributing causes to observed climate changes, and to improve confidence in climate projections.
From page 112...
... . Such a system is required for other aspects of climate change research and applications not addressed in this report including climate change attribution and detection and providing a broad range of climate and weather services (NRC, 2001 e)
From page 113...
... EVALUATING PROGRESS IN UNDERSTANDING CLIMATE FEEDBACKS The simulation of individual feedback processes must be tested against appropriate observations in order to measure our understanding, reveal the reasons why climate sensitivity varies from model to model, and know which models are most likely to be correct. To do this requires a welldesigned set of observed diagnostic tests, or metrics, that will measure our understanding and provide standards against which models can be tested.
From page 114...
... An alternative strategy is to use observations of shorter-term variability to test understanding and simulation of climate feedback processes. Strongly forced variations such as annual, diurnal, and ENSO cycles seem to provide valuable tests for understanding the processes underlying climate change feedbacks.
From page 115...
... Climate Modeling and Analysis for Climate Feedbacks Research A practical goal of climate feedbacks research is to provide information necessary to support more reliable projections of future climates. To test understanding and modeling of climate feedback processes using a set of climate feedback metrics requires a substantial infrastructure and a proportionate intellectual effort.
From page 116...
... . That same panel recommended enhanced resources for centralized operational activities addressed to shortterm climate predictions, to the study of predictability of climate on decadal and century time scales, and to assessments of ozone depletion and climate change (NRC, 2001 c)
From page 117...
... It has the potential to foster more comprehensive investigations of climate change feedbacks. In this approach, teams of scientists, including observationalists, process modelers, and global climate modelers, are to undertake relatively comprehensive and integrated projects focused on specific climate feedback processes and their treatment in climate models.


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