Южный Шведский нагорья
Южная шведская горная местность или южная шведская нагорья [ 1 ] (Шведский: Сидсвенска Хгландет ) - это холмистая местность, покрывающая большую часть Гёталанда на юге Швеции . За исключением отсутствия глубоких долин, ландшафт похож на местность Норрланда, найденную дальше на севере в Швеции. [ 2 ] Центральные районы горных мест содержат около тридцати узких каньонов, известных как Skurus . [ 3 ]
Большая часть высокогорья находится выше 200 MASL , и вокруг горных мест существуют большие районы, которые превышают 100 MASL. Highlands сосредоточены на Småland , но покрывают также большие борьбы Скании , Халланда , Встергётленда , Эстергётленда и Блейкинга . [ 4 ] Самая высокая точка лежит 377 MASL [ 5 ]
История
[ редактировать ]Южная шведская горная местность была заселена с северного каменного века , о чем свидетельствуют результаты CIST . [ 6 ] Во время северного бронзового века ( ок. 1700–500 г. до н.э.) было значительное расширение сельского хозяйства по всему нагорьям. Почвы, разработанные на ледниковом доле, были очищены, с камнями, а затем сложены в пирамид из камней. [6][7] Other periods of agricultural expansion are the Roman Iron Age and the High Middle Ages (c. 13th century).[7]
Poor soil conditions have posed significant difficulties for agriculture in the highlands, meaning that over time small industries became relatively important in local economies.[6] Many abandoned fields are now covered with forest. Vestiges of abandoned fields can be recognised through the highlands by the characteristic piles of stones made when areas were cleared for cultivation.[6]
Climate and weather events
[edit]The climate of the western parts of the highlands is more humid than on the east. This is due to orographic precipitation caused by southwestern wind forcing moist air over the highlands.[8] Lake Sommen in the northeastern part of the highlands has relatively low humidity and low precipitation.[9] Ljungby in the southwestern parts of the highlands holds the monthly precipitation record for Småland with 347 mm in August 1945.[8] The South Swedish highlands has the records for the coldest and hottest temperatures in Götaland.[8] The cold record is −38.5 °C on 16 January 1918 in Lommaryd,[8] while the hot record is 38 °C on 29 June 1947 in Målilla.[8]
Temperatures on Tomtabacken, are lower all year round than those of the surrounding area.
In January the mean daily temperature on the summit falls to around -5°C, which is similar to the temperature in Dalsland or Uppland, both of which are significantly further north. In July the mean daily temperature only reaches around 14°C, comparable with Jokkmokk on the Arctic Circle. The annual mean daily temperature is below 5°C, comparable to Östersund, 750 km further north. Although snowfall usually occurs from late October to early May, in the nearby village of Spinkabo measurable snowfall was observed on 30 September 1995 (12 cm) and 14 June 1982 (7 cm). Since only three months have an mean daily temperature exceeding 10°C, the climate qualifies as subarctic.[10][11] Winter is often the longest season, in higher elevations lasting from mid-November until end of March. Galtåsen located far from the coast and on an altitude 360 m.a.s.l. averaging meteorological winter from 14 November until 2 April. Summer lasts from 2 June to 3 September.
| Climate data for Tomtabacken 1931-1990 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | −2.8 (27.0) |
−2.8 (27.0) |
1.3 (34.3) |
7.5 (45.5) |
13.2 (55.8) |
17.3 (63.1) |
18.5 (65.3) |
17.0 (62.6) |
13.1 (55.6) |
7.6 (45.7) |
1.8 (35.2) |
−1.5 (29.3) |
7.5 (45.5) |
| Daily mean °C (°F) | −5.0 (23.0) |
−5.2 (22.6) |
−2.4 (27.7) |
2.4 (36.3) |
8.2 (46.8) |
12.5 (54.5) |
14.0 (57.2) |
12.7 (54.9) |
9.1 (48.4) |
4.9 (40.8) |
0.0 (32.0) |
−3.4 (25.9) |
4.0 (39.2) |
| Mean daily minimum °C (°F) | −7.2 (19.0) |
−7.6 (18.3) |
−5.1 (22.8) |
−2.7 (27.1) |
3.2 (37.8) |
7.7 (45.9) |
9.5 (49.1) |
8.6 (47.5) |
5.2 (41.4) |
2.1 (35.8) |
−1.8 (28.8) |
−5.3 (22.5) |
0.5 (32.9) |
| Source: [12] | |||||||||||||
| Climate data for Galtåsen 361 m.a.s.l. (1931-1990) & extremes since 1901 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | −3.0 (26.6) |
−2.6 (27.3) |
1.9 (35.4) |
7.3 (45.1) |
13.4 (56.1) |
17.3 (63.1) |
17.8 (64.0) |
16.9 (62.4) |
12.6 (54.7) |
7.8 (46.0) |
2.0 (35.6) |
−1.6 (29.1) |
7.5 (45.4) |
| Daily mean °C (°F) | −5.5 (22.1) |
−5.5 (22.1) |
−2.4 (27.7) |
1.9 (35.4) |
8.0 (46.4) |
12.1 (53.8) |
13.4 (56.1) |
12.4 (54.3) |
8.3 (46.9) |
4.8 (40.6) |
−0.2 (31.6) |
−3.9 (25.0) |
3.6 (38.5) |
| Mean daily minimum °C (°F) | −8.0 (17.6) |
−8.4 (16.9) |
−6.5 (20.3) |
−3.1 (26.4) |
2.8 (37.0) |
6.9 (44.4) |
8.6 (47.5) |
8.0 (46.4) |
4.4 (39.9) |
1.8 (35.2) |
−2.8 (27.0) |
−6.0 (21.2) |
−0.2 (31.6) |
| Average precipitation mm (inches) | 75.3 (2.96) |
50.8 (2.00) |
60.5 (2.38) |
62.6 (2.46) |
71.3 (2.81) |
80.7 (3.18) |
109.8 (4.32) |
115.6 (4.55) |
103.2 (4.06) |
78.1 (3.07) |
84.0 (3.31) |
73.4 (2.89) |
964.4 (37.97) |
| Source 1: SMHI[13] | |||||||||||||
| Source 2: SMHI Monthly Data 2015-2019[14] | |||||||||||||
| Climate data for Taberg 342 m.a.s.l 2002–2018; extremes since 1901 | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Mean daily maximum °C (°F) | −0.7 (30.7) |
−0.7 (30.7) |
3.7 (38.7) |
10.1 (50.2) |
15.4 (59.7) |
18.6 (65.5) |
21.0 (69.8) |
19.4 (66.9) |
15.4 (59.7) |
8.9 (48.0) |
4.1 (39.4) |
1.1 (34.0) |
9.5 (49.1) |
| Daily mean °C (°F) | −3.6 (25.5) |
−3.2 (26.2) |
−0.5 (31.1) |
4.5 (40.1) |
9.4 (48.9) |
12.8 (55.0) |
15.5 (59.9) |
14.3 (57.7) |
10.8 (51.4) |
5.5 (41.9) |
1.7 (35.1) |
−1.4 (29.5) |
5.5 (41.9) |
| Mean daily minimum °C (°F) | −6.1 (21.0) |
−6.1 (21.0) |
−4.8 (23.4) |
−1.1 (30.0) |
3.2 (37.8) |
7.0 (44.6) |
9.9 (49.8) |
9.2 (48.6) |
6.1 (43.0) |
2.1 (35.8) |
−0.7 (30.7) |
−3.8 (25.2) |
1.5 (34.7) |
| Source 1: SMHI Average Data 2002–2018[15] | |||||||||||||
| Source 2: SMHI Open Data[16] | |||||||||||||
The South Swedish highlands are less exposed to storms than the southern and western coasts of Sweden, yet storms can still be very destructive.[8] The 2005 Cyclone Gudrun was particularly strong, causing much damage to forests in the southwestern part of the highlands.[8][17] Spruces were particularly hit by Gudrun, while other trees with a more steady root system fared better.[17] Damage was exacerbated by the planting of spruces and practice of clearcutting, which left many trees exposed to the wind.[17] Gudrun also caused blackouts and disabled telecommunications infrastructure through the highlands.[8][17]
Geology
[edit]
Within a geological context the highlands are the expression of the South Swedish Dome.[5] The South Swedish Dome has subsided and been uplifted multiple times by epeirogenic movements during the Phanerozoic. The dome has had periods of subsidence, and burial in sediments have alternated with periods of exhumation and the formation of peneplains and hilly relief. The Sub-Cambrian peneplain of Late Neoproterozoic age is the oldest of the surfaces. It covers the eastern and northern flanks of the dome and its crest region where it is up-broken.[18][19] The Sub-Mesozoic hilly relief covers the southern and western fringes of the dome, corresponding roughly with the counties of Halland, Blekinge and northeastern Scania. The youngest well-defined surface is the South Småland peneplain that formed in the Neogene.[18] In detail the South Swedish Dome has the form of a piedmonttreppen or staircase of erosion surfaces. From top to bottom the levels are:[1]
- the crestal and upbroken portions of the Sub-Cambrian peneplain
- the 300 m a.s.l. peneplain[A]
- the 200 m a.s.l. peneplain, containing various inselbergs.[19][B]
- the South Småland peneplain (175–125 m a.s.l.)[C]
- the 100 m a.s.l. surface which is part of the South Småland peneplain
The Late Cenozoic uplift of the dome is tentatively related to far-field compressional stresses that has uplifted the region as a giant anticline-like lithosphere fold. As such it is similar to uplifted passive margins like the Scandinavian Mountains or the mountains of Western and Eastern Greenland.[21]
Last ice age and deglaciation
[edit]During the last deglaciation of the Weichselian Ice Sheet the South Swedish highlands was a place of ice flow divergence.[22] Deglaciation of southern Sweden was relatively slow with ice margin retreat rates of less than 150 m/yr. The retreat was interrupted multiple times by small glacier advances. These advances led to the formation of a series of end moraine systems. During deglaciation in southern Sweden glacier ice was mostly warm-based with some lesser parts being cold-based.[23]
At present various lakes in the South Swedish highlands contain planktonic crustacean species that are relics from the time the Weichselian Ice Sheet left the area about 12,000 years ago.[24][23] Lake Sommen stands out for having as much as three glacial relict crustacean species. These species are Pallasea quadrispinosa, Mysis affinis and Limnocalanus macrurus. Yet the lake lacks the most common relict crustacean found in the lakes of southern Sweden, the Mysis relicta.[24]
See also
[edit]Notes
[edit]- ^ This level was considered as part of a post-Silurian peneplain by Sten Rudberg as it could be matched to hills in Västergötland (Kinnekulle, Halleberg, Hunneberg and Billingen).[1][20] Karna Lidmar-Bergström consider this correlation plausible but the evidence tenuous.[20]
- ^ The existence of this surface was first noted by S. Nordlindh in 1924 in a monograph about hydropower and topography.[20]
- ^ The South Småland peneplain was first noted by Sten De Geer in 1913.[20]
References
[edit]- ^ Jump up to: a b c Lidmar-Bergström, Karna; Olvmo, Mats; Bonow, Johan M. (2017). "The South Swedish Dome: a key structure for identification of peneplains and conclusions on Phanerozoic tectonics of an ancient shield". GFF. 139 (4): 244. Bibcode:2017GFF...139..244L. doi:10.1080/11035897.2017.1364293. S2CID 134300755.
- ^ Lundqvist, Jan (1969). "Landskapet". In Lundqvist, Magnus (ed.). Det Moderna Sverige (in Swedish). Bonniers. pp. 64–67.
- ^ Olvmo, Mats (2006). "Skuruna i Småland". Geologiskt Forum (in Swedish). 50: 8–11. Retrieved April 22, 2019.
- ^ Åkerhielm, Erik (1912). "Sydsvenska höglandet". Geografien i skildingar och bilder (in Swedish). Lund. pp. 49–90. Retrieved June 7, 2015.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ Jump up to: a b Lidmar-Bergström, Karna; Bonow, Johan M.; Japsen, Peter (2013). "Stratigraphic Landscape Analysis and geomorphological paradigms: Scandinavia as an example of Phanerozoic uplift and subsidence". Global and Planetary Change. 100: 153–171. Bibcode:2013GPC...100..153L. doi:10.1016/j.gloplacha.2012.10.015.
- ^ Jump up to: a b c d "Kulturspår på sydsvenska höglandet". Skogskunskap (in Swedish). November 6, 2016. Retrieved May 10, 2019.
- ^ Jump up to: a b Lagerås, Per (2013). "Agrara fluktuationer och befolknings-utveckling på sydsvenska höglandet tolkade utifrån röjningsrösen". Fornvännen (in Swedish). 108 (4): 263–277.
- ^ Jump up to: a b c d e f g h "Smålands klimat". SMHI (in Swedish). January 16, 2018. Retrieved May 10, 2019.
- ^ "4. östra Götalands sprickdals- och eklandskap". Skogliga naturvärdesregioner för södra Sverige [Forest biodiversity regions in southern Sweden] (PDF) (Report) (in Swedish). Södra. 2015. p. 66.
- ^ "Tidiga snöfall i Sverige". Retrieved 2016-02-24.
- ^ "Sena snöfall i Sverige". Retrieved 2016-02-24.
- ^ "SMHI". Archived from the original on 2013-02-13.
- ^ "Försvarsmakten Open Data for Kvarn, Militärområde" (in Swedish). Swedish Meteorological and Hydrological Institute.
- ^ "Monthly and Yearly Statistics" (in Swedish). SMHI. 11 April 2019.
- ^ "Monthly & Yearly Statistics". SMHI. Retrieved 28 June 2019.
- ^ "SMHI öppna data för Huskvarna". SMHI. Retrieved 2019-06-30.
- ^ Jump up to: a b c d "Skogsskador efter Gudrun". SMHI (in Swedish). July 8, 2015. Retrieved May 10, 2019.
- ^ Jump up to: a b Japsen, Peter; Green, Paul F.; Bonow, Johan M.; Erlström, Mikael (2016). "Episodic burial and exhumation of the southern Baltic Shield: Epeirogenic uplifts during and after break-up of Pangaea". Gondwana Research. 35: 357–377. Bibcode:2016GondR..35..357J. doi:10.1016/j.gr.2015.06.005.
- ^ Jump up to: а беременный Лидмар-Бергстрём, Карна . "Sydsvenska Höglandet" . Национальная энциклопедия (на шведском языке). Цидония развитие . Получено 30 ноября 2017 года .
- ^ Jump up to: а беременный в дюймовый Лидмар-Бергстрем (1988). «Денудационные поверхности зоны щита на юге Швеции». Географические летописи . 70 A (4): 337–350. Bibdode : 1988geana..70..337L . Doi : 10.1080/04353676.1988.11880265 .
- ^ Джапсен, Питер; Чалмерс, Джеймс А.; Зеленый, Пол Ф.; Боноу, Йохан М. (2012). «Повышенные, пассивные континентальные края: не рифтовые плечи, а выражения эпизодического, пост-рифмового захоронения и эксгумации». Глобальные и планетарные изменения . 90–91: 73–86. BIBCODE : 2012GPC .... 90 ... 73J . doi : 10.1016/j.gloplacha.2011.05.004 .
- ^ Лундквист, Ян ; Лундквист, Томас ; Линдстрем, Моритс ; Калнер, Микаэль; Sivhed, Ulf (2011). «Провинция Свекокарелска». Геология Швеции: с древнего времени до представления (на шведском языке) (3 -е изд.). Испания: студенческая литература . P. 978-91-44-05847-4 .
- ^ Jump up to: а беременный Adseven, arjen p; Hättestraland, clas; Клеман, Джоан; Хейман, Джейкоб; Фабел, Дерек; Фредин, Ола; GoodFrow, Bradley W; Гавань, Джонатан М; Янсен, Джон Д; Олсен, Ларс; Caffee, Marc W; Финк, Дэвид; Лундквист, Ян ; Rosqvist, Gunld C; Стремберг, Бо; Янссон, Кристер Н. (2016). «Деглакация фенноскандии» . Quatrance Обзоры 147 : 91–1 BIBCODE : 2016QSRV . doi : 10.1016/j.quascirev . HDL : 1956/1
- ^ Jump up to: а беременный Кинстен, Бьорн (2010). Распределение ледниковых ракообразных на юге Швеции (Гёталанд и Свеалэнд) (PDF) (отчет) (на шведском языке). Окружной административный совет Блейкинг округ. стр. 1–19 . Получено 19 апреля 2019 года .