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Asymmetric Geopotential Height Fluctuations from Symmetric Winds
Publisher: American Meteorological Society
Abstract: As a characterization of the variability of observed geopotential height fluctuations, their probability density function (PDF) and its skewness are studied in the global domain for winter and summer. The PDF of the ...
The Path Density of Interhemispheric Surface-to-Surface Transport. Part II: Transport through the Troposphere and Stratosphere Diagnosed from NCEP Data
Publisher: American Meteorological Society
Abstract: Interhemispheric transport from the earth?s surface north of 32.4°N (region ΩN) to the surface south of 32.4°S (region ΩS) is quantified using the path-density diagnostic developed in Part I of this study. The path density ...
The Path Density of Interhemispheric Surface-to-Surface Transport. Part I: Development of the Diagnostic and Illustration with an Analytic Model
Publisher: American Meteorological Society
Abstract: A new path-density diagnostic for atmospheric surface-to-surface transport is formulated. The path density ? gives the joint probability that air whose last surface contact occurred on patch Ωi at time ti will make its ...
Optimal Spectral Topography and Its Effect on Model Climate
Publisher: American Meteorological Society
Abstract: Gibbs oscillations in the truncated spectral representation of the earth's topography are strongly reduced by determining its spectral coefficients as a minimum of a nonuniformly weighted, nonquadratic cost function. The ...
Analysis of Passive Tracer Transport as Modeled by an Atmospheric General Circulation Model
Publisher: American Meteorological Society
Abstract: Tracers without feedback on the atmosphere are used to probe tropospheric transport. Such passive tracers are considered for two important anthropogenic sources, Europe and eastern North America. The linearity of passive ...
Transit-Time and Tracer-Age Distributions in Geophysical Flows
Publisher: American Meteorological Society
Abstract: Transport in the atmosphere and in the ocean is the result of the complex action of time-dependent and often highly turbulent flow. A useful diagnostic that summarizes the rate at which fluid elements are transported from ...
The Ocean’s Memory of the Atmosphere: Residence-Time and Ventilation-Rate Distributions of Water Masses
Publisher: American Meteorological Society
Abstract: A conceptually new approach to diagnosing tracer-independent ventilation rates is developed. Tracer Green functions are exploited to partition ventilation rates according to the ventilated fluid?s residence time in the ...
Simulated Changes in Atmospheric Transport Climate
Publisher: American Meteorological Society
Abstract: Atmospheric ?transport climate? characterizes how trace gases are distributed by and within the atmosphere, on average, as a consequence of the interaction of atmospheric flow with tracer sources and sinks. The change in ...
Ventilation Rates Estimated from Tracers in the Presence of Mixing
Publisher: American Meteorological Society
Abstract: The intimate relationship among ventilation, transit-time distributions, and transient tracer budgets is analyzed. To characterize the advective?diffusive transport from the mixed layer to the interior ocean in terms of ...
Airmass Origin in the Arctic. Part I: Seasonality
Publisher: American Meteorological Society
Abstract: he first climatology of airmass origin in the Arctic is presented in terms of rigorously defined airmass fractions that partition air according to where it last contacted the planetary boundary layer (PBL). Results from a ...