Atmospheres of the World s Deserts .

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Some General Properties. Meteorological characteristicsSurface characteristicsVegetation attributes. Assortment of Properties. Frosty deserts and hot desertsDeserts with winter precipitation and deserts with summer precipitation and deserts with for all intents and purposes no precipitationPerpetually foggy leaves and abandons with close to the most extreme conceivable sunshineBarren deserts and intensely vegetated desertsSand-du
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Section 3 Climates of the World\'s Deserts

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Some General Properties Meteorological qualities Surface attributes Vegetation attributes

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Variety of Properties Cold deserts and hot Deserts with winter precipitation and deserts with summer precipitation and deserts with for all intents and purposes no precipitation Perpetually foggy forsakes and abandons with close to the most extreme conceivable daylight Barren deserts and vigorously vegetated deserts Sand-hill betrays and leaves with rough fields

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Summary of Meteorological Characteristics (Then we\'ll cover physiographic and vegetation attributes)

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Desert Climate Types

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Warm Versus Cold Deserts

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Daily aggregate sunlight based vitality got at top of environment on even surface COLD DESERT WARM DESERT

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Climate % parched terrains Coldest mo Warmest mo Examples Hot 43 10-30 >30 Central Sahara Great Sandy (Aust) Mild Winter 18 10-20 10-30 Southern Sahara Kalahari Mexico Deserts Simpson (Aust) Cool Winter 15 0 10-30 Northern Sahara Atacama Mojave Cold Winter 24 <0 10-30 Canadian Prairie Gobi Turkestan Deserts of China Great Basin

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Coastal/Foggy Desert Summer temperatures are not particularly high, but rather the winters are not frosty on the grounds that the sea is close Can be exceptionally awkward in light of high stickiness

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Temperature (strong) and Relative Humidity (dashed), at Different Distances From Namib Desert Coast FOG 30 km from drift 5 km from drift Far inland

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Seasonality of Precipitation (a few/none of each)

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A Closer Look

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Rule of Thumb Summer precip on Equatorial side Winter precip on mid-scope side

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Desert Temperature Why is it high? Absence of dissipation from surface Lack of vegetation (transpiration) Not much overcast cover

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Cloud Cover

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Desert Winds Subtropical deserts -High weight ranges are by and large characterized by feeble winds -Thunderstorms can create high winds -Mid-scope aggravations (lows) with high winds can infiltrate into deserts Cold forsakes in mid-scopes, encounter mid-scope tornados (lows) that can have solid winds Lack of vegetation – close surface winds higher Winds are exceptionally drying up – high temperature combined with high winds

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Desert Humidity Relative stickiness can be as low as a couple percent, or as high as 100% (foggy waterfront leave) Specific moistness Compared to hot damp tropics, betray air is drier But abandon quality of 95 F and 15% RH has more water vapor than does immersed air at 32 F in a winter storm

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Humidity Calculations Use the table on the past slide to discover vapor weight, immersion vapor weight, and relative dampness for: Temperature = 38 C, Dew point = 7 C Temperature = - 1 C, Dew point = - 4 C Which area is more muggy? It relies on upon how you characterize humidity!!!!

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Desert Humidity Compare the relative and outright stickiness of a forsake and winter storm Desert 95 F and 15% RH Find dew point temperature for these conditions Winter storm 32 F and 100% RH Find dew point temperature for these conditions Which area is more damp?

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General Physiographic Characteristics (Why do we mind in a meteorology course?)

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Types Sand "sheets" and sand rises Bare level shake "Forsake asphalt" – framework of stones solidified together at first glance Salt pads Large shakes and mountains Clay fields

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Northern Chihuahuan Desert

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Areas With Interior Drainage

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General Vegetation Characteristics

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Vegetation Types Small trees Shrubs Succulents Grasses Herbs Lichens

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Vegetation Types That are Adapted to Desert Conditions Phreatophyte – long roots Xerophyte – instruments for rationing water Halophytes – adjusted to saline soils Psammophytes – develop in sandy soils Therophytes (annuals) – seeds stay lethargic in soil amid dry season or dry years (diverge from enduring)

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Landscape Types in Terms of Vegetation Steppes – prairie without trees, for the most part in midlatitudes Savannas – additionally open meadow, yet there are scattered bushes and trees (subtropical, speaking to a move between tropical woodlands and meadow of dry zones)

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The Deserts of Africa

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African Deserts

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Orography of the Sahara and Sahel

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Large-Scale Weather Patterns of the Sahara and Sahel

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Climate of the Horizontal Wind and Sea-level Pressure

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Penetration of Monsoon and Frontal Precipitation

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Monthly Precipitation

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Maximum Observed 24-h Precipitation (mm)

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Maximum Observed Annual Precipitation (mm)

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Budyko Index (Aridity)

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Annual Cloudiness (%)

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Record Maximum Temperature

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Record Minimum Temperature

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Mean Diurnal Temperature Range

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Annual Range of Daily Mean Temperature

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Orography of Southwestern Africa

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Budyko Index (Aridity)

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Temperature Anomaly (C), Summer

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Monthly Precipitation

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Cross Section of Southern Africa

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Orography of the Horn of Africa

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The Budyko Index (Aridity)

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Monthly Precipitation

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The Deserts of North America

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Monthly Precipitation

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Orography of North America

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The Budyko Index (Aridity)

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The Deserts of South America

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Orography of Western South America

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Monthly Precipitation

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Orography of Southern South America

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Monthly Precipitation

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Budyko Index (Aridity)

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Australian Deserts

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Orography of Australia

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Budyko Index (Aridity)

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Monthly Precipitation

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Seasonal Distribution of Precipitation

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Asian Deserts

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