نتایج جستجو برای: stadial transmission
تعداد نتایج: 246081 فیلتر نتایج به سال:
A continuous high-resolution Western Mediterranean sea surface temperature (SST) alkenone record spanning the past 250,000 years shows that abrupt changes were more common at warming than at cooling. During marine isotope stage (MIS) 6, SST oscillated following a stadial-interstadial pattern but at lower intensities and rates of change than in the Dansgaard/Oeschger events of MIS 3. Some of the...
A stochastic Duffing-type oscillator model, i.e noise-driven motion with inertia in a potential landscape, is considered for glacial millennial-scale climate transitions. The potential and noise parameters are estimated from a Greenland ice-core record using a nonlinear Kalman filter. For the period from 60 to 20 ky before present, a bistable potential with a deep well corresponding to a cold s...
Ordovician and Silurian glacial erratics of the Laerheide area (Lower Saxony, north-western Germany) bear well-preserved graptolites. The faunas provide important information on the origin and transport direction of the sediments preserved in a kame, representing the Drenthe stadial of the Saalian glaciation. The faunas even include species not commonly encountered in the successions of mainlan...
The infection with the hemoflagellate parasite Trypanosoma cruzi originates from America where wildlife cycle remains to alternate between mammals and hematophagous triatomines. Transmission through contamination of bite site by vector feces containing highly infectious forms or direct ingestion T. -infected triatomines appear be dominant transmission mechanisms. Man joins when he enters this w...
We present a timeseries of flood and slumping phases in central Europe for the past 65,000 years from event layers sediment cores infilled Eifel maar basins (Germany). Palynological, petrographic organic carbon (chlorins) records are used to understand precise timing these events. Periods increased activity seem coincide with Heinrich stadials marine records, which associated cold more arid cli...
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