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
Transcripts
Slide 1

Section 3 Climates of the World\'s Deserts

Slide 2

Some General Properties Meteorological qualities Surface attributes Vegetation attributes

Slide 3

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

Slide 4

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

Slide 5

Desert Climate Types

Slide 6

Warm Versus Cold Deserts

Slide 9

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

Slide 10

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

Slide 11

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

Slide 13

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

Slide 14

Precipitation

Slide 15

Seasonality of Precipitation (a few/none of each)

Slide 20

A Closer Look

Slide 22

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

Slide 23

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

Slide 24

Cloud Cover

Slide 25

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

Slide 26

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

Slide 28

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!!!!

Slide 29

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?

Slide 30

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

Slide 31

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

Slide 33

Mojave

Slide 35

Northern Chihuahuan Desert

Slide 37

Areas With Interior Drainage

Slide 38

General Vegetation Characteristics

Slide 39

Vegetation Types Small trees Shrubs Succulents Grasses Herbs Lichens

Slide 40

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)

Slide 41

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)

Slide 42

The Deserts of Africa

Slide 43

African Deserts

Slide 44

Orography of the Sahara and Sahel

Slide 45

Large-Scale Weather Patterns of the Sahara and Sahel

Slide 46

Climate of the Horizontal Wind and Sea-level Pressure

Slide 47

Penetration of Monsoon and Frontal Precipitation

Slide 48

Monthly Precipitation

Slide 49

Maximum Observed 24-h Precipitation (mm)

Slide 50

Maximum Observed Annual Precipitation (mm)

Slide 51

Budyko Index (Aridity)

Slide 52

Annual Cloudiness (%)

Slide 53

Record Maximum Temperature

Slide 54

Record Minimum Temperature

Slide 55

Mean Diurnal Temperature Range

Slide 56

Annual Range of Daily Mean Temperature

Slide 57

Orography of Southwestern Africa

Slide 58

Budyko Index (Aridity)

Slide 59

Temperature Anomaly (C), Summer

Slide 60

Monthly Precipitation

Slide 61

Cross Section of Southern Africa

Slide 62

Orography of the Horn of Africa

Slide 63

The Budyko Index (Aridity)

Slide 64

Monthly Precipitation

Slide 65

The Deserts of North America

Slide 67

Monthly Precipitation

Slide 68

Orography of North America

Slide 69

The Budyko Index (Aridity)

Slide 70

The Deserts of South America

Slide 72

Orography of Western South America

Slide 73

Monthly Precipitation

Slide 74

Orography of Southern South America

Slide 75

Monthly Precipitation

Slide 76

Budyko Index (Aridity)

Slide 77

Australian Deserts

Slide 79

Orography of Australia

Slide 80

Budyko Index (Aridity)

Slide 81

Monthly Precipitation

Slide 82

Seasonal Distribution of Precipitation

Slide 83

Asian Deserts

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