A.N. Antipov, O.I. Bazhenova, L.V. Danko V.B. Sochava I nstitute of - - PowerPoint PPT Presentation

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The regional features of semi-arid landscape dynamics in southern Siberia and the desertification problem of Central and Northern Asia A.N. Antipov, O.I. Bazhenova, L.V. Danko V.B. Sochava I nstitute of Geography SB RAS 664033, 1

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V.B. Sochava I nstitute of Geography SB RAS 664033, 1 Ulan-Batorskaya Str., I rkutsk, Russian Federation danko@irigs.irk.ru

The regional features of semi-arid landscape dynamics in southern Siberia and the desertification problem

  • f Central and Northern Asia

A.N. Antipov, O.I. Bazhenova, L.V. Danko

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SLIDE 2

Физическая география должна стремиться не к пространственным обобщениям ради них самих, т.е. как к самоцели, и не к историческим (т.е. палеогеографическим) обобщениям как самоцели. Физическая география стремиться к познанию сущности изучаемых ею пространств … . А географические явления (природные тела) существуют в пространстве и во времени. Сходство и различия определяют различное положение в пространстве, различное положение во времени. К.К. Марков. Воспоминания и размышления географа. 1973

V.B. Sochava I nstitute of Geography SB RAS

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SLIDE 3

The m ain directions of research The m ain directions of research: :

► ►

I ndication of the desertification I ndication of the desertification scenes scenes of semi

  • f semi-
  • arid landscapes and analysis

arid landscapes and analysis their dynamics. their dynamics. Temporal scales: Temporal scales:

  • 1 000

1 000-

  • 500 years

500 years – – Holocene Holocene

  • 100

100-

  • 200 years

200 years – – Late Holocene Late Holocene

  • 50

50-

  • 1

1 years years – – last thousand years last thousand years

  • 1

1 month month – – XI X XI X-

  • XX centuries

XX centuries

► ►

Study of the temporal and spatial features of interactions betwe Study of the temporal and spatial features of interactions between: en:

  • desertification factors

desertification factors

  • landscape

landscape-

  • forming processes

forming processes

  • landscape properties

landscape properties

► ►

Estimation of tendencies of the desertification Estimation of tendencies of the desertification as an integral physical as an integral physical-

  • geographical process:

geographical process:

  • local aspect

local aspect

  • regional aspect

regional aspect

  • global aspect

global aspect V.B. Sochava I nstitute of Geography SB RAS

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SLIDE 4

Deflation Aeolian forms. Accumulation Aeolian forms.

DI FFERENT AEOLI AN GEOMORPHOLOGI CAL PROCESSES

V.B. Sochava I nstitute of Geography SB RAS

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SLIDE 5

Lake Baikal

V.B. Sochava I nstitute of Geography SB RAS

General General study area study area

Landscape-climatically regins:

1 – Красноярско-Канский steppe-forest midi continental 2 – Назаровский steppe-forest midi continental 3 – Минусинский steppe midi continental 4 – Койбальский piedmont steppe midi continental 5 – Ангаро-Ленский steppe-forest strong continental 6 – Баргузинский steppe strong continental 7 – Удинский steppe strong continental 8 – Селенгинско-Хилокский steppe strong continental 9 – Онон-Аргунский steppe strong continental 10 – Кызылский desert-steppe strong continental 11 – Убсунурский desert-steppe strong continental

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Main param eters of clim ate Main param eters of clim ate

V.B. Sochava I nstitute of Geography SB RAS

K* * K* * K* K* I * * I * * I * I * T* * T* * T* T*

11 11 10 10 9 9 8 8 7 7 6 6 5 5 4 4 3 3 2 2 1 1 87 87 96 96 0,91 0,91 0,76 0,76 223 223

  • 4,4

4,4

  • 5,5

5,5

Desert-steppe strong continental

86 86 95 95 1,10 1,10 0,75 0,75 253 253

  • 2,4

2,4

  • 4,5

4,5

Desert-steppe strong continental

77 77 85 85 0,80 0,80 0,72 0,72 319 319

  • 1,3

1,3

  • 2,2

2,2

Steppe strong continental

65 65 71 71 0,82 0,82 0,78 0,78 345 345 + 0,1 + 0,1

  • 0,5

0,5

Steppe strong continental

74 74 79 79 0,98 0,98 0,82 0,82 280 280

  • 1,5

1,5

  • 2,6

2,6

Steppe strong continental

76 76 77 77 0,64 0,64 0,68 0,68 327 327

  • 2,6

2,6

  • 2,8

2,8

Steppe strong continental

65 65 70 70 0,64 0,64 0,60 0,60 391 391

  • 1,7

1,7

  • 2,7

2,7

Steppe-forest strong continental

49 49 54 54 0,75 0,75 0,65 0,65 452 452 + 1,8 + 1,8 + 0,8 + 0,8

Piedmont steppe midi continental

55 55 59 59 1,01 1,01 0,85 0,85 337 337 + 0,7 + 0,7

  • 0,5

0,5

Steppe midi continental

50 50 55 55 0,66 0,66 0,55 0,55 490 490

  • 0,1

0,1

  • 0,5

0,5

Steppe-forest midi continental

50 50 56 56 0,64 0,64 0,65 0,65 462 462 + 0 + 0, ,8 8 + 0 + 0, ,8 8

Steppe-forest midi continental

Coefficient Coefficient of

  • f

continentality continentality I ndex I ndex of

  • f

iridizations iridizations Mean annual Mean annual precipitation, precipitation, mm* mm* Mean annual air Mean annual air temperature, temperature, o

  • C

C Landscape Landscape-

  • climatic

climatic Regions Regions

* - mean annual (for 1890-1960 years) ; * * - mean for 30 years period (1968-1998)

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Long Long-

  • term annual dynam ic

term annual dynam ic

  • f the Aeolian processes.
  • f the Aeolian processes.

Dust storm s Dust storm s

V.B. Sochava I nstitute of Geography SB RAS

1 1 2

Meteostations: a – 5 Landscape-climatic Region (Залари); б, в – 7 Landscape-climatic Region (Улан-Удэ, Тарбагатай); г – 8 Landscape-climatic Region (Борзя).

1 2

1 – annual dates 2 – 3 years running average I rkutsk meteostation

days days days days days

1

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V.B. Sochava I nstitute of Geography SB RAS

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SLIDE 9

11 10 9 8 7 6 5 4 3 2 1

+

  • +

+

  • 0 ,49

0 ,05

Убусунурский desert-steppe strong continental

+ + +

  • +

+

  • 0 ,99

0 ,09

Кызылский desert-steppe strong continental

+ + + + о + + 2 ,13 0 ,04

Онон-Аргунский steppe strong continental

+

  • 0 ,55

0 ,05

Селенгинско-Хилокский steppe strong continental

+

  • 0 ,53

0 ,06

Удинский steppe strong continental

+

  • 0 ,09

0 ,08

Баргузинский steppe strong continental

+ + +

  • 0 ,95

0 ,03

Ангаро-Ленский steppe-forest strong continental

  • +

+ + + + 2 ,50 0 ,05

Койбальский piedmont steppe midi continental

  • +

1 ,14 0 ,07

Минусинский steppe midi continental

  • +

+ + 1 ,06 0 ,08

Назаровский steppe-forest midi continental

+

  • +

+ 0 ,13 0 ,08

Красноярско-Канский steppe-forest midi continental Defla- tion Dust storms Degra- dation of perma- frost Aeolian

processes

Deflu- ction Snow melting flow Slope rain full flow Ero- sion Mean annual precipi- tation, mm* Mean annual air tempe- rature, oC

Tendencies of the landscape-forming processes Climatic tendencies

Landscape-clim atic regions:

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