Landscape evolution is the window to the link between deep earth and surface processes. One of the key issues in landscape evolution is to characterize the topographic steady state of mountain belts. The Taiwan mounta...Landscape evolution is the window to the link between deep earth and surface processes. One of the key issues in landscape evolution is to characterize the topographic steady state of mountain belts. The Taiwan mountain belt is an extraordinary case due to its extremely high uplift and denudation rates. The uplift of Taiwan Island is caused by the oblique collision between the Luzon Arc and the East Asian continent. In this case, the mountain building process in the north always occurs earlier than that in the south,which causes the spatial distribution of steady-state regions.The East Central Range receives much research attention with the presence of river basins that mainly distribute along the trajectory of the collision propagation. Normally, based on analyses of geomorphic parameters, the whole Central Range, or at least part of it, should be at a topographic steady state. However, the balance between uplift rates and denudation rates that exist in these regions is seldomly tested. In this contribution, we make a comprehensive literature review on the uplift and denudation rates derived from various approaches, including sediment yields, in-situ cosmogenic nuclide ^(10) Be, incision of river channels,thermochronology, and GPS observations. This literature review reveals that the topographic steady state may prevail in the northern and middle parts of the East Central Range.However, an obvious inconsistency in denudation rates calculated by different methods prevents us from better constraining the topographic steady state in some regions of this mountain range.展开更多
如图,河左岸泊着4条小船,一个船公想把4条船都转移到对岸去,不过,要受下面几个条件的限制。 A 每条船的船帮上都写着各自到对岸所需的时间。 B 每次可以再拖带一条船一同过河,但此时要以两船中较慢的一条计时。 C 拴、解缆绳,来回换乘...如图,河左岸泊着4条小船,一个船公想把4条船都转移到对岸去,不过,要受下面几个条件的限制。 A 每条船的船帮上都写着各自到对岸所需的时间。 B 每次可以再拖带一条船一同过河,但此时要以两船中较慢的一条计时。 C 拴、解缆绳,来回换乘以及发动引擎的时间可以不计。 请问,把全部4条船送到对岸的最短时间是多少?展开更多
基金supported by National Natural Science Foundation of China(Grant Nos.41376049 and 41225020)National Programme on Global Change and Air-Sea Interaction(GASI-GEOGE-03)by Ao Shan Talents Program Supported by Qingdao National Laboratory for Marine Science and Technology(No.2015ASTP-OS11)
文摘Landscape evolution is the window to the link between deep earth and surface processes. One of the key issues in landscape evolution is to characterize the topographic steady state of mountain belts. The Taiwan mountain belt is an extraordinary case due to its extremely high uplift and denudation rates. The uplift of Taiwan Island is caused by the oblique collision between the Luzon Arc and the East Asian continent. In this case, the mountain building process in the north always occurs earlier than that in the south,which causes the spatial distribution of steady-state regions.The East Central Range receives much research attention with the presence of river basins that mainly distribute along the trajectory of the collision propagation. Normally, based on analyses of geomorphic parameters, the whole Central Range, or at least part of it, should be at a topographic steady state. However, the balance between uplift rates and denudation rates that exist in these regions is seldomly tested. In this contribution, we make a comprehensive literature review on the uplift and denudation rates derived from various approaches, including sediment yields, in-situ cosmogenic nuclide ^(10) Be, incision of river channels,thermochronology, and GPS observations. This literature review reveals that the topographic steady state may prevail in the northern and middle parts of the East Central Range.However, an obvious inconsistency in denudation rates calculated by different methods prevents us from better constraining the topographic steady state in some regions of this mountain range.
文摘如图,河左岸泊着4条小船,一个船公想把4条船都转移到对岸去,不过,要受下面几个条件的限制。 A 每条船的船帮上都写着各自到对岸所需的时间。 B 每次可以再拖带一条船一同过河,但此时要以两船中较慢的一条计时。 C 拴、解缆绳,来回换乘以及发动引擎的时间可以不计。 请问,把全部4条船送到对岸的最短时间是多少?
