Publications


DISSIPATIVE DESTABILIZATION OF EXTERNAL ROSSBY WAVES

JOURNAL OF THE ATMOSPHERIC SCIENCES 43 (1986) 388-396

IM HELD, RT PIERREHUMBERT, RL PANETTA


THE EFFECT OF LOCAL BAROCLINIC INSTABILITY ON ZONAL INHOMOGENEITIES OF VORTICITY AND TEMPERATURE

ADVANCES IN GEOPHYSICS 29 (1986) 165-182

RT PIERREHUMBERT


STRATIFIED SEMIGEOSTROPHIC FLOW OVER TWO-DIMENSIONAL TOPOGRAPHY IN AN UNBOUNDED ATMOSPHERE

JOURNAL OF THE ATMOSPHERIC SCIENCES 42 (1985) 523-526

RT PIERREHUMBERT


A THEORETICAL-MODEL OF OROGRAPHICALLY MODIFIED CYCLOGENESIS

JOURNAL OF THE ATMOSPHERIC SCIENCES 42 (1985) 1244-1258

RT PIERREHUMBERT


UPSTREAM EFFECTS OF MESOSCALE MOUNTAINS

JOURNAL OF THE ATMOSPHERIC SCIENCES 42 (1985) 977-1003

RT PIERREHUMBERT, B WYMAN


STATIONARY EXTERNAL ROSSBY WAVES IN VERTICAL SHEAR

JOURNAL OF THE ATMOSPHERIC SCIENCES 42 (1985) 865-883

IM HELD, RL PANETTA, RT PIERREHUMBERT


LOCAL AND GLOBAL BAROCLINIC INSTABILITY OF ZONALLY VARYING FLOW

JOURNAL OF THE ATMOSPHERIC SCIENCES 41 (1984) 2141-2162

RT PIERREHUMBERT


LINEAR RESULTS ON THE BARRIER EFFECTS OF MESOSCALE MOUNTAINS

JOURNAL OF THE ATMOSPHERIC SCIENCES 41 (1984) 1356-1367

RT PIERREHUMBERT


FORCED COHERENT STRUCTURES AND LOCAL MULTIPLE EQUILIBRIA IN A BAROTROPIC ATMOSPHERE

JOURNAL OF THE ATMOSPHERIC SCIENCES 41 (1984) 246-257

RT PIERREHUMBERT, P MALGUZZI


OROGRAPHIC DISTORTION OF FRONTS

RIVISTA DI METEOROLOGIA AERONAUTICA 44 (1984) 249-263

RT PIERREHUMBERT


FORMATION OF SHEAR LAYERS UPSTREAM OF THE ALPS

RIVISTA DI METEOROLOGIA AERONAUTICA 44 (1984) 237-248

RT PIERREHUMBERT


BOUNDS ON THE GROWTH OF PERTURBATIONS TO NON-PARALLEL STEADY FLOW ON THE BAROTROPIC BETA-PLANE

JOURNAL OF THE ATMOSPHERIC SCIENCES 40 (1983) 1207-1217

RT PIERREHUMBERT


DYNAMICS OF WEATHER REGIMES - QUASI-STATIONARY WAVES AND BLOCKING

MONTHLY WEATHER REVIEW 110 (1982) 1105-1145

BB REINHOLD, RT PIERREHUMBERT


THE TWO-DIMENSIONAL AND 3-DIMENSIONAL INSTABILITIES OF A SPATIALLY PERIODIC SHEAR-LAYER

JOURNAL OF FLUID MECHANICS 114 (1982) 59-82

RT PIERREHUMBERT, SE WIDNALL


A family of steady, translating vortex pairs with distributed vorticity

Journal of Fluid Mechanics 102 (1981) 478-

RT Pierrehumbert

In our discussion of the behaviour of the limiting vortex pair boundary near the front stagnation point, we demonstrated that there are no solutions to the Euler equations in the half-plane x > 0 consisting of a region of constant non-zero vorticity separated from a region of irrotational flow by a straight-line boundary; from this we argued that the limiting vortex boundary must have a cusp where it contacts the negative y axis (see p. 137). However, a cusp is not the only kind of singular behaviour possible near the stagnation point. Prof. P. G. Saffman has pointed out to us that if the curvature of the boundary is allowed to become infinite at the stagnation point, the case of contact angle θO= 1/2π cannot be precluded, and further that such a solution can be found to leading order. In the rotational region we choose a stream function. © 1981, Cambridge University Press. All rights reserved.


THE STRUCTURE OF ORGANIZED VORTICES IN A FREE SHEAR-LAYER

JOURNAL OF FLUID MECHANICS 102 (1981) 301-313

RT PIERREHUMBERT, SE WIDNALL


A FAMILY OF STEADY, TRANSLATING VORTEX PAIRS WITH DISTRIBUTED VORTICITY

JOURNAL OF FLUID MECHANICS 99 (1980) 129-144

RT PIERREHUMBERT


2 AND 3 DIMENSIONAL INSTABILITIES OF A SPATIALLY PERIODIC SHEAR-LAYER

BULLETIN OF THE AMERICAN PHYSICAL SOCIETY 25 (1980) 1085-1085

RT PIERREHUMBERT, SE WIDNALL


How much should we believe correlations between Arctic cyclones and sea ice extent?

The Cryosphere Copernicus GmbH 11 (0) 3023-3034

JGL Rae, AD Todd, EW Blockley, JK Ridley

<jats:p>&lt;p&gt;&lt;strong&gt;Abstract.&lt;/strong&gt; This paper presents an investigation of the robustness of correlations between characteristics of Arctic summer cyclones and September Arctic sea ice extent. A cyclone identification and tracking algorithm is run for output from 100-year coupled climate model simulations at two resolutions and for 30 years of reanalysis data, using two different tracking variables (mean sea-level pressure, MSLP; and 850&lt;span class="thinspace"&gt;&lt;/span&gt;hPa vorticity) for identification of the cyclones. The influence of the tracking variable, the spatial resolution of the model, and spatial and temporal sampling on the correlations is then explored. We conclude that the correlations obtained depend on all of these factors and that care should be taken when interpreting the results of such analyses. Previous studies of this type have used around 30 years of reanalysis and observational data, analysed with a single tracking variable. Our results therefore cast some doubt on the conclusions drawn in those studies.&lt;/p&gt; </jats:p>

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