E N D
1. 1 ?????????????????????????????? ????????????????????
?????????????????????
????????????????????
???????????????????????
?????????????????????
???????????????????????????????????????
??: ????????, ?????????, ???????????
2. 2 ?????????????????????? ???????????????????????
????????????????????????????
?????????????????????????????????????
???????????????????????
????????????
???????????????
3. 3 ?????????????????????? (1)
4. 4 ??????????????????????????????????????? ??????? 1 bar ??????????????????????????? 1 ???????? ??? 1 ?? ???????????????????? (???????????? bar ?????????????????????????????????????????)
???????????????????????????????????????????????????????? (Technical Atmosphere) ??????? 1 Kg/cm2 = 0.981 bar ???????????????????????????? (Physical Atmosphere)1 atm = 1.01325 bar???????????1 psi = 0.068947 bar??????? 1 bar ??????????????????????????? 1 ???????? ??? 1 ?? ???????????????????? (???????????? bar ?????????????????????????????????????????)
?????????????????????????????
5. 5 ?????????????????????
6. 6 ?????????????????????? ???????????????????????????????? (%)
NITROGEN 78.084
OXYGEN 20.946
ARGON 0.934
CARBON DIOXIDE 0.033
NEON 0.00182
HELIUM 0.00052
???? 0.00066
(KRYTON, HYDROGEN, XENON, OZONE, RADON, ETC.)
7. 7 ????? ??????????????????????????? ?????????????????????????????????
?????????????????? ??????????????????????????????
??????????????????????????????????????????? ????????? 3% ??????????????????????
??????????????????? ??????????????????????????? 6 ????????
???????????? ?????????????????????????????????? ?????????????????????????????? ??? ??????????
8. 8 ???????????????? CO2 ?????????????????????????????????? ???????????????? ???????????????????? ?????????????
CO2 ?????????????????????????
?????? 99% ??? CO2 ??????????????????? ?????????????? ?????????????????????????????? CO2 ?????????????
????????? ???? CO2 ?????? 10% ??? CO2 ????????????????? ??????????????????????????????????????
??????????????? CO2 ???????????????????????????
9. 9 ??????????????????? ?????????????????????????????? 4 ???? ??? TROPOSPHERE, STRATOSPHERE, MESOSPHERE, ??? THERMOSPHERE
?????????? 3 ???????????????????????????? ? ????????????? ????????????????? HOMOSPHERE
??????????????????????????????? ????????????? ??????????????? ????????????????????????????????? ?????????????????????? ???????????????????????
10. 10
11. 11 TROPOSPHERE ???????????????????????
??????????????????????????????????? ???????????????????????????????
??????????????????????????????????????????????????
????????????????????????????? ?????? 6 ???? C ??? 1 ??.
???????????????? TROPOPAUSE ???????????????? ????????? 8 ?????????????????? ????????? 18 ????????????????????????
12. 12
13. 13 JETSTREAM
14. 14 STRATOSPHERE ???????????????????????? TROPOSPHERE ???????????????? 50 - 55 ????????
???????????????????????????????????????????? UV ??????????????????
???????????????????????? ???????????????????????????????
??????????????????? ???????????????????????? ? ???????? ?????????????????
???????????????? STRATOPAUSE
??????????????????????? (MOTHER-OF-PEARL) ???????????????? 20-30 ???????? ???????????????? ( Mantreal protocal )
???????????????????????????? ???????????????????????????????????????? ?? 1977 (2520 ) ????????????????????????????????? (United Nations Environmental Programme ,UNEP ) ????????????????????????????????????? ?? 1985 (2528 ) ??????????????????????? ( UNEP Veinna convention) ??????????????????????????????????????????????????????????? ? ??? 20 ????????????????? 16 ??????? 1987 (2530) ???????????????????????? ? ??????? ????????????????? ???????????? ???????????????????????????????? ( Mantreal protocal )???????????????????????? ? 47 ?????? ?????????????????????????????????????????????? ??? ??????????????????????????? ( Ozone Depletion substances , ODS) ??????? CFC ??? Hologen ?????????????????????????????????????????????????????????????? Ozone ?????????? 1986 (2529 ) ?? 50 % ?????? 2000 ( 2543) ??????????????????????????????????????????? ??????? CFC-11( R-11) , CFC -12 (R-12) ,CFC -113(R-113),CFC -114(R-114),CFC -115(R-115), ???Halons (??????????????????????????????????)??1990 ?????????????????????????????????????????????????? 2000 (2543) ???????????????????????????????????????????????????????????????????????? chlorine ???? methyl chloroform (CH3CCl3) ???carbon tetrachloride (CCl4)
??? ??????????????????? NASA ???????????????????????????????? Stratosphere ?????????????? NASA ER-2 ??????????? UARS ???????????????? 1992 ??????????????????? chlorine ?????????????????????? ????????????????? chlorine monoxide (ClO) ????????????????????????????????????????? ?????? chlorine ?????????????????????????????????????????????????????????????????? ???????? Stratosphere ????????????????? CFCs ???????????????? ( Mantreal protocal )
???????????????????????????? ???????????????????????????????????????? ?? 1977 (2520 ) ????????????????????????????????? (United Nations Environmental Programme ,UNEP ) ????????????????????????????????????? ?? 1985 (2528 ) ??????????????????????? ( UNEP Veinna convention) ??????????????????????????????????????????????????????????? ? ??? 20 ????????????????? 16 ??????? 1987 (2530) ???????????????????????? ? ??????? ????????????????? ???????????? ???????????????????????????????? ( Mantreal protocal )???????????????????????? ? 47 ?????? ?????????????????????????????????????????????? ??? ??????????????????????????? ( Ozone Depletion substances , ODS) ??????? CFC ??? Hologen ?????????????????????????????????????????????????????????????? Ozone ?????????? 1986 (2529 ) ?? 50 % ?????? 2000 ( 2543) ??????????????????????????????????????????? ??????? CFC-11( R-11) , CFC -12 (R-12) ,CFC -113(R-113),CFC -114(R-114),CFC -115(R-115), ???Halons (??????????????????????????????????)??1990 ?????????????????????????????????????????????????? 2000 (2543) ???????????????????????????????????????????????????????????????????????? chlorine ???? methyl chloroform (CH3CCl3) ???carbon tetrachloride (CCl4)
??? ??????????????????? NASA ???????????????????????????????? Stratosphere ?????????????? NASA ER-2 ??????????? UARS ???????????????? 1992 ??????????????????? chlorine ?????????????????????? ????????????????? chlorine monoxide (ClO) ????????????????????????????????????????? ?????? chlorine ?????????????????????????????????????????????????????????????????? ???????? Stratosphere ????????????????? CFCs
15. 15
16. 16 ????????? (MOTHER-OF-PEARL CLOUD) Nacreous Cloud
17. 17 MESOSPHERE ?????????? STRATOSPHERE ?????????????????????? 80 ????????
???????????????????????????????? STRATOSPHERE
??????????????????????
?????????????????????????????????????? ????????? - 95 ???? C ???????? 80 ????????
????????????????? MESOPAUSE
????????????????????????? (NOCTILUCENT CLOUD) ???????? ????????????????????????????????????????????????????????
18. 18 NOCTILUCENT CLOUD
19. 19 THERMOSPHERE ?????????? MESOSPHERE ??????
???????????????????????????????????????????? ??????????? X ??? UV ????????????? ?????????????????? ?????????????????????????????? ??????????
????????????????????????????????????? 400 - 500 ????????
IONIZATION ?????????????????????????? ????????????????????? ??????????? IONOSPHERE ????????????????????????????????????
20. 20 ??????????????????????? ?????????????????????????????? ?????????????????? ???????? ????????????????????????????????
??????????????????????? ????????????? ??? ??????????? ? ????????????????????? ?????????????????????????????????
?????????????????????????????????????? 1 ???? ????????? ??????????????????????????????????????????????? 2 ????? 100 ???
??????????????????????????????????????????? ?????????????????? ???????? ??????????????????????????????????????????????? ??????????????????????
21. 21 ?????????????????? ?????? 99% ????????????????????? ?????????? ???????????? 0.15 - 4.0 MICRON ???????????????? ????????? ????????????????????????????????? ??????? SHORT-WAVE RADIATION
???????????????????????????????? ??????????? ULTRAVIOLET (UV) 7% , VISIBLE 43% , INFRARED 49% ??? x, gamma, radio wave 1%
?????? 51% ?????????????????????????????????????????????????????? ???????????????????????????????????????????????? (SCATTERING)
22. 22
23. 23
24. 24 ??????????????
25. 25 Water Vapor and Liquid Water
26. 26 Evaporation and Condensation
27. 27 Sublimation and Deposition
28. 28 Homogeneous Nucleation
29. 29 Heterogeneous Nucleation
30. 30 Condensation Nuclei
31. 31 Cooling The Air to the Dew Point
32. 32 Adiabatic Processes
33. 33 Dry Adiabatic Lapse Rate
34. 34 Condensation and Dry Adiabatic Lapse Rate
35. 35 Saturated Adiabatic Lapse Rate
36. 36 Environmental Lapse Rate
37. 37 General Forms of Condensation
38. 38 Clouds
39. 39 Formation of Clouds
40. 40 Dissipation of Clouds
41. 41 ??? ????????????????????????????????????????????? ??????? ??????????????????? (??????????????) ???????????????????????????? ????????????????????
????????????????? 2 ?????? ?????????? (CUMULIFORM CLOUD) ?????????? ???? ??????? (STRATIFORM CLOUD)
?????????????????????????????????????? ? ???????????????????? ????????????
?????????????????????????????????????????????????
???????????????????????? ?????????? ??????????? ?????????????
42. 42 ????????? ??????? (6-18 ??.)
CIRRUS (Ci)
CIRROCUMULUS (Cc)
CIROSTRATUS (Cs)
???????? (2-8 ??.)
ALTOCUMULUS (Ac)
ALTOSTRATUS (As) ??????? (??????? – 2 ??.)
NIMBOSTRATUS (Ns)
STRATOCUMULUS (Sc)
STRATUS (St)
?????????????????? (??????? – 18 ??.)
CUMULUS (Cu)
CUMULONIMBUS (Cb)
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59 ???????????????????????????General Circulation
60. 60 ????????????????????????????????????????????????????????????????????????? ????????????????????????????????????????????????????????????????????????????????? ?????????????????????????????????????????????????????????????????
??????????????????????????????????????????????????????????????????? ????????
??????????????????????????????????????
?????????????????????????????????????????????????????????????????????????????????????????????? 6 ??????????
????????????????????? ???? ???????? ??? ??????????? ?????????????????????????????????????????????????
61. 61 Radiation Budget at the top of the Earth’s Atmosphere
62. 62 ????????????????????????????????????????????????????????????? (???????????????????)“????????????????????????????????” ??????????????????????????????????????????????????????????????????????????????????????????????????????????
?????????????????????????????????????????????????????????????????
63. 63 ???????????????????????????????????????????????????????????? ??????????????????????????????????????????
????????????????????????????????????????????????????????????????
????????????????????????????????????????????????????????????????????????????????????????????????????????????????
64. 64 ??????????????????????????????????????????????????????
65. 65 ?????????????????????????????????????? Hadley cell (????????????????????????????????????????)
????????????????????????????????????????????????????????????????????
??????????????????????????????????????????????????????????????? ~ 30 ????
??????: ????? (trade wind), ?????????????????? (ITCZ)
Ferrel Cell (????????????????????????????????????????????????)
???????????????????????????????????????????????????????????????
?????????????????????????????????????????? ~ 60 ???? ?????????????????????? ~ 30 ????
??????: ??????????????????????? 30-60 ????
66. 66 ??????????????????????????
Equator (doldrums)
30 degrees (horse latitudes)
???????????????????? cold polar air and mid-latitude warmer air ???????? polar front
67. 67
68. 68
69. 69 ???? ??????????????????????????? ???????????????????????????????????????????????????????????????????????? ??? ??????????????? ????????????????????????????????????????????????????????????????????????
Hadley cell, ?????????????????????????????????????????????????????????
Ferrel cell ???????????????????????????????????????????????????????????????????????????? ? (Eddy)
????????????? ????????????????????????????????????? ?????????????????????????????????
Pole to pole Hadley cell is unstable in the presence of rotation
rotation yields trade winds; surface westerlies in NH; upper tropospheric jets
70. 70 Air Mass Properties Air masses take on the properties of the underlying surface
Air masses are classified according to their location of origin
Geographical Characteristics
Tropical, Polar, Arctic
Surface Properties
Maritime, continental
Source region characteristics most prevalent if air mass remain over source region for a long period
71. 71 Air Mass Classifications cP - continental Polar
Cold, dry, stable
mP - miritime Polar
Cool, moist, unstable
mT - maritime Tropical
Warm, moist, usually unstable
cT - continental Tropical
Hot, dry
Stable air aloft, unstable surface air
72. 72 Air Mass Source Regions
73. 73 The Pineapple Express brings heavy rain Warm, moist mT air moves into California on Jan. 1, 1997
Heavy flooding caused 100,000 people to flee their homes
Yesemite NP experienced nearly $200 million in damages and was closed for two months
74. 74 Air mass characteristics can differ tremendously
75. 75 Fronts
76. 76 Characteristics of Fronts A cross the front - look for one more of the following:
Change of Temperature
Change of Moisture characteristic
RH, Td
Change of Wind Direction
Change in direction of Pressure Gradient
Characteristic Precipitation Patterns
77. 77 How do we decide what kind of front it is? From the vantage point of the ground, if warm air replaces colder air, the front is a warm front
If cold air replaces warmer air, the front is a cold front
If the front does not move, it is a stationary front
Occluded fronts do not intersect the ground; the interface between the air masses is aloft
78. 78 Typical Cold Front Structure Cold air replaces warm; leading edge is steep in fast-moving front shown below due to friction at the ground
Strong vertical motion an unstable air forms cumuliform clouds
Upper level winds blow ice crystals downwind creating cirrus and cirrostratus
Slower moving fronts have less steep boundaries and less vertically developed clouds may form if warm air is stable
79. 79 Typical Warm Front Structure In an advancing warm front, warm air rides up over colder air at the surface; slope is not usually very steep
Lifting of the warm air produces clouds and precipitation well in advance of boundary
At different point along the warm/cold air interface, the precipitation will experience different temperature histories as it falls to the ground
80. 80
81. 81 Mid-latitude Cyclone Frontal Structure
82. 82 Mature Wave Cyclone
83. 83 Partially occluded wave cyclone
84. 84
85. 85 Scale of Motion Microscale : meters
Turbulent eddies
Formed by mechanical disturbance or convection
Lifetimes of minutes
Mesoscale : km’s to 100’s of km’s
Local winds and circulaitons
Land/sea breeze, mountain/valley winds, thunderstorm, tornadoes
Lifetimes of minutesto hours
Synoptic scale : 100’s to 1000’s of km’s
Circulations around high and low pressure systems
Lifetimes of days to weeks
Global scale : systems ranging over entire globe
86. 86 Sea and Land Breezes Sea and land breeze
Mesoscale coastal winds
Thermal circulations driven by differential heating/cooling of adjacent land and water surfaces
Most prevalent when/where solar heating is strong
Sea breeze development
Solar heating raises land temperature more than water
Air in contact with land warms and rises
Cooler (denser) sea air move in to replace rising air over land
Air sinking over the water in response to surface air movement, producing return circulation (land-to-sea breeze) aloft
87. 87 Sea / Land breezes Covering gulf of Mexico and Atlantic sea breezes produce uplift and thunderstorm development in Florida
Disruption of sea breezes reduces rainfall and can lead to a bad fire season
Land breeze form at night due to stronger radiative cooling of the land surface leading to sinking and offshore flow of this cooler air mass with return flow aloft
88. 88 The monsoon Monsoon winds are
Seasonal
Common in eastern and southern Asia
Similar to huge land/sea breeze systems
During winter strong cooling produces a shallow high pressure area over Siberia
Subsidence, clockwise circulation and flow out from the high provide fair weather for southern and eastern Asia
During summer, air over the continent heats and rises, drawing moist air in from the oceans
Convergence and topography produce lifting and heavy rain formation
89. 89 Mountain/Valley winds Sunlight heats mountain slopes during the day and they cool by radiation at night
Air in contact with surface is heated/cooled in response
A difference in air density is produced between air next to the mountainside and air at the same altitude away from the mountain
Density difference produces upslope (day) or downslope (night) flow
Daily upslope/downslope wind cycle is strongest in clear summer weather when prevailing winds are light
90. 90 Dynamic process of the atmosphere
91. 91 ??????? ? ???????????????????????????? CORIOLIS FORCE (?????????????????????????, ????????????????)
PRESSURE GRADIENT FORCE (PGF)
Pressure Gradient = (P2 – P1) / (X2 – x1)
PGF: Pressure=Force/area => Force=area x pressure = volume x pressure gradient (pressure gradient is change in pressure per unit distance) => Force = (mass/density) x pressure gradient
GRAVITY
CENTIPITAL FORCE
FRICTION
92. 92 Coriolis Force Objects, or parcels of air or water, moving relative to the Earth’s rotation (i.e. that we, as observers on the rotating Earth, see as moving) experience an additional centrifugal force. It is this force that is called the Coriolis Force. While the Coriolis force has the same mathematical form for northward and eastward motion the physical explanation is best presented differently:
93. 93 Geostrophic wind
94. 94 Geostrophic balance
95. 95 Thermal Wind Thermal Circulations
As discussed earlier, winds blow because of differences in atmospheric pressure. Pressure gradients may develop on a local to a global scale because of differences in the heating and cooling of the Earth's surface. Heating and cooling cycles that develop daily or annually can create several common local or regional thermal wind systems. The basic circulation system that develops is described in the generic illustrations below.
96. 96 Thermal wind
97. 97 Thermal Circulation Atmospheric circulation caused by the heating and cooling of air.
98. 98 Daytime development of sea breeze
99. 99 Daytime development of valley breeze
100. 100 Winter and Summer monsoon wind patterns for southeast Asia (large scale thermal wind)
101. 101 The Gradient Wind
When isobars are curved the geostrophic wind follows a curved path - the air/water is subject to a centrifugal force as well!
The gradient wind for anticyclonic flow is stronger than the geostrophic wind but for cyclonic flow is weaker
102. 102 Gradient Winds
103. 103 ??????????????? ??????????????? ???????????????????????????????? ????????????? ????????????????????????? ?????????????????????????????? ????????? ????????????????????????????????????? ?????? ?????
?????????????????????????????????????????? ???????????????? ?????????????????
???????????????????? 3 ????? ??? DEPRESSION, TROPICAL STORM, ??? TYPHOON ???? HURRICANE ???? CYCLONE
104. 104 ??????????????? ??????????????? ???????????????????????????????? ????????????? ????????????????????????? ?????????????????????????????? ????????? ????????????????????????????????????? ?????? ?????
?????????????????????????????????????????? ???????????????? ?????????????????
???????????????????? 3 ????? ??? DEPRESSION, TROPICAL STORM, ??? TYPHOON ???? HURRICANE ???? CYCLONE
105. 105 ???????????????????????? DEPRESSION ?????????????????? 61 ??./???????
TROPICAL STORM ?????????? 61-119 ??./???????
TYPHOON, HURRICANE, CYCLONE ????????????????? 119 ??./?????????????
TYPHOON ????????????????????????????
HURRICANE ??????????????????????? ????????????
CYCLONE ???????????????
106. 106
107. 107
108. 108
109. 109
110. 110 Tropical Cyclone
111. 111
112. 112
113. 113
114. 114
115. 115
116. 116 El Nino Southern Oscillation (ENSO) Trade winds promote cold water upwelling in eastern tropical Pacific
Cool, deep water is nutrient rich and supports rich ecosystem (plankton, fish, birds,…)
Weaker trades lead to weaker upwelling. Warm nutrient-poor tropical water replaces the cold, nutrient-rich water.
Every few years this El Nino (surface warming) persists and is widespread
Huge ecosystem and economic losses
Alters weather pattern over a large region
117. 117
118. 118
119. 119
120. 120 Why do we care about ENSO? Global impacts on weather.
Long timescale (months) yields improved seasonal predicition.
121. 121 Impacts of El Nino Droughts
Fires
Agricultural productivity
Water supply
Extreme Precipitation
Floods
Erosions
Disease
Impacts through marine food chain
Natural ecological responses
Economics