Daily fields obtained from a 17-yr atmospheric GCM simulation are used to study the surface sensible and latent heat flux variability and its relationship to the sea level pressure (SLP) field. The fluxes are analyzed over the North Pacific and Atlantic Oceans during winter. The leading mode of interannual SLP variability consists of a single center associated with the Aleutian low in the Pacif...

Changes in the sea surface heights (SSH) and geostrophic transports in the NE Pacific are examined during the 1997–1998 El Niño using altimeter data, sea level pressure (SLP) fields, proxy winds and satellite sea surface temperature (SST). Most of the signal occurs along the boundaries of the basin from Panama to the Alaska Peninsula. Changes in the SSH and alongshore transports along the bound...

Dust storm is a natural hazardous phenomenon that affects arid and semi-arid regions of the world same as Iran. The present research aims to investigate formation synoptic patterns pervasive dust storms (PDSs) in southwestern For this purpose, daily data visibility less than 1000m 16 stations (Ilam Khuzestan provinces) were reviewed during 2004–2017, 59 PDSs with more 2 days duration (overlappe...

Measurements of wind strength and direction abstracted from European ships’ logbooks during the recently finished CLIWOC project have been used to produce the first gridded Sea Level Pressure (SLP) reconstruction for the 1750–1850 period over the North Atlantic based solely on marine data. The reconstruction is based on a spatial regression analysis calibrated by using data taken from the ICOAD...

TheWalker circulation is linked to extratropical waves that are deflected from theNorthernHemisphere polar regions and travel southeastward over central Asia toward the western Pacific warm pool during northern winter. The wave pattern resembles the east Atlantic–west Russia pattern and influences the El Niño–Southern Oscillation (ENSO) region. A tripole pattern between theWest Siberian Plain a...

summer heat and drought conditions, especially in the southern half of iran's air sovereignty is recognized. in order to investigate the synoptic conditions - scanning the effect of unusual rain event for summer 12 to 6 september 2008 (22-16 september 1387) in the southern zagros range, environmental approach to sightseeing and daily statistics recording station 270 days of rain detected. ...

The summer-to-summer variability of the areal extent of marine stratiform cloudiness (MSC; stratus, stratocumulus, and fog) over the North Pacific is examined for the period of record 1952–92 using a dataset based on surface observations. Variability is largest in two regions: the central and western Pacific along 358N coincident with a strong meridional gradient in climatological MSC amount, a...

Regional patterns of tropical Indo-Pacific climate change are investigated over the last six decades based on a synthesis of in situ observations and ocean model simulations, with a focus on physical consistency among sea surface temperature (SST), cloud, sea level pressure (SLP), surface wind, and subsurface ocean temperature. A newly developed bias-corrected surface wind dataset displays west...

[1] This study analyzes the spatial and temporal changes in sunshine duration (SunDu) and total cloud cover (TCC) over the Iberian Peninsula (IP) and four subregions during 1961–2004 using high-quality, homogenized data sets. The analyses confirm that over most of the IP and in most seasons, SunDu and TCC variations are strongly negatively correlated, with absolute values 0.8–0.9. Somewhat weak...

This study revisits the question posed by Hoskins on why the Northern Hemisphere Pacific sea level pressure (SLP) anticyclone is strongest and maximally extended in summer when the Hadley cell descent in the northern subtropics is the weakest. The paradoxical evolution is revisited because anticyclone buildup to the majestic summer structure is gradual, spread evenly over the preceding 4–6 mont...