Anders Rapp (1927–1998) was a Swedish

geomorphologist Geomorphology () is the scientific study of the origin and evolution of topographic and bathymetric features generated by physical, chemical or biological processes operating at or near Earth's surface. Geomorphologists seek to understand why ...

and

geographer A geographer is a physical scientist, social scientist or humanist whose area of study is geography, the study of Earth's natural environment and human society, including how society and nature interacts. The Greek prefix "geo" means "earth" a ...

who pioneered quantitative geomorphological approach on mass movements and

erosion Erosion is the action of surface processes (such as Surface runoff, water flow or wind) that removes soil, Rock (geology), rock, or dissolved material from one location on the Earth's crust#Crust, Earth's crust and then sediment transport, tran ...

. He was the first to make a comprehensive study on avalanche boulder tongues. Most of Rapp's works were made in the

Scandinavian Mountains The Scandinavian Mountains or the Scandes is a mountain range that runs through the Scandinavian Peninsula. The western sides of the mountains drop precipitously into the North Sea and Norwegian Sea, forming the fjords of Norway, whereas to th ...

and

Spitsbergen Spitsbergen (; formerly known as West Spitsbergen; Norwegian language, Norwegian: ''Vest Spitsbergen'' or ''Vestspitsbergen'' , also sometimes spelled Spitzbergen) is the largest and the only permanently populated island of the Svalbard archipel ...

including the areas of Kärkevagge near

Abisko Abisko (; ) is a village in Sápmi (Lapland (Sweden), Lapland), in northern Sweden, roughly 200 km north of the Arctic Circle, and near Abisko National Park, located 4 km west of the village. It had 85 inhabitants as of 2005. Permafr ...

and

Kebnekaise Kebnekaise (; from Sami language, Sami or , "Cauldron Crest") is the highest mountain in Sweden. The Kebnekaise massif, which is part of the Scandinavian Mountains, Scandinavian mountain range, has two main peaks. The glaciated southern peak use ...

. Studying under Filip Hjulström, Rapp got his Ph.D. at

Uppsala University Uppsala University (UU) () is a public university, public research university in Uppsala, Sweden. Founded in 1477, it is the List of universities in Sweden, oldest university in Sweden and the Nordic countries still in operation. Initially fou ...

in 1961, and was appointed professor of

physical geography Physical geography (also known as physiography) is one of the three main branches of geography. Physical geography is the branch of natural science which deals with the processes and patterns in the natural environment such as the atmosphere, h ...

Lund University Lund University () is a Public university, public research university in Sweden and one of Northern Europe's oldest universities. The university is located in the city of Lund in the Swedish province of Scania. The university was officially foun ...

in 1977.LUM - Lunds universitet meddelar - nr 11 1997: Geografin 100-årsjubilerar i Lund
"Geography celebrates 100 years in Lund" In 1980, he was elected a member of the

Royal Swedish Academy of Sciences The Royal Swedish Academy of Sciences () is one of the Swedish Royal Academies, royal academies of Sweden. Founded on 2 June 1739, it is an independent, non-governmental scientific organization that takes special responsibility for promoting nat ...

Research contributions

Building on the process-geomorphology tradition of his supervisor Hjulström, Rapp introduced systematic sediment-budget techniques to cold-region landscapes. His 1961 thesis on the Kärkevagge valley quantified every pathway by which rock is liberated from frost-shattered cliffs, transported downslope by

avalanche An avalanche is a rapid flow of snow down a Grade (slope), slope, such as a hill or mountain. Avalanches can be triggered spontaneously, by factors such as increased precipitation or snowpack weakening, or by external means such as humans, othe ...

s and

debris flow Debris flows are geological phenomena in which water-laden masses of soil and fragmented Rock (geology), rock flow down mountainsides, funnel into stream channels, entrain objects in their paths, and form thick, muddy deposits on valley floors. ...

s, and ultimately stored in valley-floor talus—demonstrating that avalanche boulder tongues can move blocks more than 70 tonnes at mean rates of 0.5 metres per year. The work became a benchmark for coupling climate, slope process and landform evolution, and earned him the Kirk Bryan Award of the

Geological Society of America The Geological Society of America (GSA) is a nonprofit organization dedicated to the advancement of the geosciences. History The society was founded in Ithaca, New York, in 1888 by Alexander Winchell, John J. Stevenson, Charles H. Hi ...

in 1962. From 1966 to 1976 he led Sweden's contribution to the

International Hydrological Decade International is an adjective (also used as a noun) meaning "between nations". International may also refer to: Music Albums * ''International'' (Kevin Michael album), 2011 * ''International'' (New Order album), 2002 * ''International'' (The T ...

high-mountain programme. Instrument arrays on

recorded that suspended-

sediment Sediment is a solid material that is transported to a new location where it is deposited. It occurs naturally and, through the processes of weathering and erosion, is broken down and subsequently sediment transport, transported by the action of ...

yields during summer snowmelt were an order of magnitude higher after snow-avalanche winters than after wind-blown winters, demonstrating the role of winter climate in controlling annual

denudation Denudation is the geological process in which moving water, ice, wind, and waves erode the Earth's surface, leading to a reduction in elevation and in relief of landforms and landscapes. Although the terms erosion and denudation are used interchang ...

budgets. Parallel expeditions to central

mapped sorted-circle fields and dated debris-flow lobes, providing the first process rates for high-Arctic

periglacial Periglaciation (adjective: "periglacial", referring to places at the edges of glacial areas) describes geomorphic processes that result from seasonal thawing and freezing, very often in areas of permafrost. The meltwater may refreeze in ice wedg ...

slopes.

References

{{DEFAULTSORT:Rapp, Anders Swedish geographers Uppsala University alumni Academic staff of Lund University Members of the Royal Swedish Academy of Sciences 1998 deaths 1927 births Climatic geomorphologists Process geomorphologists Swedish geomorphologists 20th-century Swedish geographers