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Calverton, MD, United States

Navarra A.,CMCC INGV | Kinter III J.L.,COLA | Tribbia J.,NCAR
Bulletin of the American Meteorological Society | Year: 2010

Some components of the new level of organization and the method to design, select, plan, execute, and analyze numerical experiments on complex computing and data management systems. A strict application of the scientific method requires a process of isolation of constituent subsystems and experimental verification of a hypothesis. This is nly possible by using the numerical models, which have become the central pillar of the quantitative scientific approach to climate science. a new generation of computing systems will be composed of hundreds of thousands of processing elements and will enable numerical experiments on a large scale. Numerical experimentation on these systems willenhance climate research, and will also require a change in the way modeling experiments are conceived and carried. Models of the components of the climate system include the processes that determine the evolution of climate components. A detailed multilayer final implementation plan will have to be prepared for the final evaluation. Source


Solomon A.,COLA | Richter J.H.,NCAR | Bacmeister J.T.,NCAR
Geophysical Research Letters | Year: 2014

The quasi-biennial oscillation (QBO) is the dominant mode of variability in the tropical stratosphere, which is in large part driven by upward propagating atmospheric waves. For over three decades researchers have investigated an extratropical impact due to the vacillation of the tropical winds. The choice of a single altitude to define the QBO introduces an ambiguity into the analysis of correlations between the tropical and extratropical manifestations of this wave-driven phenomenon. It has been previously demonstrated that using empirical orthogonal functions, this ambiguity can be resolved, by calculating the phase of the QBO from the first two principal components of the stratospheric zonal mean wind. As general circulation models begin to simulate the QBO, a standard and objective means of comparing simulations with observations should be adopted. This objective analysis of the extratropical QBO is presented for the ERA-Interim reanalysis and a version of the Community Atmosphere Model, version 5, which exhibits a spontaneously generated QBO. © 2014. American Geophysical Union. All Rights Reserved. Source


Zhang S.,Princeton University | Winton M.,Princeton University | Rosati A.,Princeton University | Delworth T.,Princeton University | And 2 more authors.
Journal of Climate | Year: 2013

The non-Gaussian probability distribution of sea ice concentration makes it difficult to directly assimilate sea ice observations into a climate model. Because of the strong impact of the atmospheric and oceanic forcing on the sea ice state, any direct assimilation adjustment on sea ice states is easily overridden by model physics. A new approach implements sea ice data assimilation in enthalpy space where a sea ice model represents a nonlinear function that transforms a positive-definite space into the sea ice concentration subspace. Results from observation-assimilation experiments using a conceptual pycnocline prediction model that characterizes the influences of sea ice on the decadal variability of the climate system show that the new scheme efficiently assimilates "sea ice observations" into the model: while improving sea ice variability itself, it consistently improves the estimates of all "climate" components. The resulted coupled initialization that is physically consistent among all coupled components significantly improves decadal-scale predictability of the coupled model. © 2013 American Meteorological Society. Source


Compliance auditing and management is provided by defining business or enterprise assets, comprising receiving, from the business or enterprise variables that meet business needs of the business or enterprise as a user. Users, locations and audit templates are added. Questions to be provided to the user are entered and compliance criteria used in answering the questions and associating the compliance criteria with the questions are added. Compliance activity information from the user is received and the compliance activity information from the user to the questions is applied. Compliance activity for the user to generate a database of deployed compliance activities is scheduled and the database of deployed compliance activities is used to conduct compliance activity. The database of deployed compliance activities or the conducted compliance activity is used to generate files and incidents. The database of deployed compliance activities is used to generate compliance activity reporting.


A personalized tool, designed to help personnel manage their laboratories/organizations/companies and personal/professional development more efficiently. Access to the tools needed to run a more efficient laboratory/organization and improve patient care/customer satisfaction. The web portal provides a variety of helpful electronic tools, giving personnel the ability to update their laboratory/organization profile, view news alerts and survey results, prepare for upcoming compliance surveys/reviews and receive support for a wide range of laboratory/organization/company needs. Example features for laboratories include an easy-to-follow dashboard wheel that displays compliance/progress status information at a glance, a self-assessment wizard allowing managers to monitor their laboratorys quality and a dedicated section for waived laboratories. This provides a resource where professionals can update their lab/organization/company profile, view communications, see survey results, prepare for upcoming surveys and receive support for a whole range of laboratory/organization/company needs.

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