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  • Articles  (11)
  • AMER METEOROLOGICAL SOC  (4)
  • PANGAEA  (4)
  • European Geosciences Union  (3)
Document type
  • Articles  (11)
  • Data  (480)
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  • 1
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    supplement to Nature Geoscience (2014)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publication Date: 2014-08-05
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/x-netcdf
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  • 2
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    Results of calculated surface air temperature anomaly of COSMOS Pliocene experiment 2 in NetCDF format (2012)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publication Date: 2014-05-15
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/zip
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  • 3
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    Effects of high resolution and spinup time on modeled North Atlantic circulation (2019)
    AMER METEOROLOGICAL SOC
    In:  EPIC3Journal of Physical Oceanography, AMER METEOROLOGICAL SOC, 49(5), pp. 1159-1181, ISSN: 0022-3670
    Details
    Publication Date: 2019-06-11
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 4
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    Simulated Atlantic Multidecadal Oscillation during the Holocene (2012)
    AMER METEOROLOGICAL SOC
    In:  EPIC3Journal of Climate, AMER METEOROLOGICAL SOC, (25), pp. 6989-7002, ISSN: 0894-8755
    Details
    Publication Date: 2019-07-17
    Description: The Atlantic Multidecadal Oscillation (AMO) and its possible change during the Holocene are examined in this study, using long-term simulations of the Earth system model COSMOS. A quasi-persistent ~55- to 80-year cycle characterizing in the North Atlantic sea surface temperature, is highly associated with the multidecadal variability of the Atlantic Meridional Overturning Circulation (AMOC) during the Holocene. This mode can be found throughout the Holocene, indicating that the AMO is dominated by internal climate variability. Stronger-than-normal AMOC results in warmer-than-normal surface temperature, spreading over almost the whole North Hemisphere, in particular the North Atlantic Ocean. During the warm phase of the AMO, more precipitation is detected in the North Atlantic low and high latitudes. It also generates a dipolar seesaw pattern in the sea ice anomaly. The results reveal that the influence of the AMO can be amplified by a more vigorous AMOC variability during the early Holocene in the presence of a remnant of the Laurentide Ice Sheet and when freshwater entered the North Atlantic Ocean. This conclusion could have potential application for the past AMO reconstruction and the future AMO estimation.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
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    Predicting the June 2013 European Flooding based on Precipitation, Soil Moisture and Sea Level Pressure (2015)
    AMER METEOROLOGICAL SOC
    In:  EPIC3Journal of Hydrometeorology, AMER METEOROLOGICAL SOC, 16(2), pp. 598-614, ISSN: 1525-755X
    Details
    Publication Date: 2015-06-05
    Description: Over the past decades Europe has experienced heavy floods with major consequences for thousands of people and billions of Euros worth of damage. In particular, the summer 2013 flood in Central Europe showed how vulnerable modern society is to hydrological extremes and emphasizes once more the need for improved forecast methods of such extreme climatic events. Based on a multiple linear regression model, it is shown here that 55% of the June 2013 Elbe River extreme discharge could have been predicted using May precipitation, soil moisture and sea level pressure. Moreover, our model was able to predict more than 75% of the total Elbe River discharge for June 2013 (in terms of magnitude) by incorporating also the amount of precipitation recorded during the days prior the flood, but the predicted discharge for the June 2013 event was still underestimated by 25%. Given that all predictors used in the model are available at the end of each month, the forecast scheme can be used to predict extreme events and to provide early warnings for upcoming floods. The forecast methodology could be efficient for other rivers also, depending on their location and their climatic background.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 6
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    Millennial-scale variability in Antarctic ice-sheet discharge during the last deglaciation - Figure 4, supplementary material (2013)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publication Date: 2018-08-10
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 7
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    Stable water isotopes in the coupled atmosphere-land surface model ECHAM5-JSBACH, supplementary data (2013)
    PANGAEA
    In:  EPIC3Bremerhaven, PANGAEA
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/x-netcdf
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  • 8
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    Distinct modes of internal variability in the Global Meridional Overturning Circulation associated with the Southern Hemisphere westerly winds (2012)
    AMER METEOROLOGICAL SOC
    In:  EPIC3Journal of Physical Oceanography, AMER METEOROLOGICAL SOC, (42), pp. 785-801, ISSN: 0022-3670
    Details
    Publication Date: 2019-07-17
    Description: The internal variability of the global meridional overturning circulation (GMOC) in long-term integration of the Earth system model COSMOS is examined in this study. Two distinct modes of the GMOC, which are closely linked to the Southern Hemisphere westerly winds (SWW) anomalies, are found on multidecadal and centennial time scales. The dominant mode is characterized by Southern Ocean dynamics: strengthening and poleward shift of the SWW associated with a positive phase of the Southern Annualar mode yield Ekman-induced northward mass transport, including a zonally asymmetric response in the Southern Ocean sea surface temperature, and a cooling in the tropical Pacific Ocean due to large-scale upwelling. The second mode projects mainly onto the Atlantic meridional overturning circulation (AMOC). It is driven by a combination of SWW variation and buoyancy forcing. Based on the relationship between the two modes together with the wind perturbation experiments, we emphasize that the full AMOC response to the SWW change takes several centuries in our model. The sea surface temperature in Northern Hemisphere high latitudes is significantly affected in this mode, showing a large-scale warming. Our results from a mid-Holocene experiment imply that both modes are independent from the climate background conditions in the Holocene. Finally, we argue that the natural modes of GMOC are important to understand trends in ocean circulation, with consequences for heat and carbon budgets for past, present and future climate.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 9
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    Evolution of upper water column structure inferred from paired alkenone and tetraether lipid proxies in the central Japan/East Sea since 25 ka BP (2019)
    European Geosciences Union
    In:  EPIC3EGU General Assembly - Sharing Geoscience Online, Virtual Online Meeting, 2020-05-04-2020-05-08European Geosciences Union
    Details
    Publication Date: 2020-05-14
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 10
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    A modern prototype three-layer stratification in the Arctic Ocean since the Miocene (2021)
    European Geosciences Union
    In:  EPIC3EGU General Assembly 2021, 2021-04-19-2021-04-30Online, European Geosciences Union
    Details
    Publication Date: 2022-02-14
    Description: The tectonic opening of the Fram Strait (FS) was critical to the water exchange between the Atlantic Ocean and the Arctic Ocean, and caused the transition from a restricted to a ventilated Arctic Ocean during early Miocene. If and how the water exchange between the Arctic Ocean and the North Atlantic influenced the global current system is still disputed. We apply a fully coupled atmosphere-ocean-sea-ice model to investigate stratification and ocean circulation in the Arctic Ocean in response to the opening of the FS during early to middle Miocene. Progressive widening of the FS gateway in our simulation causes a moderate warming, while salinity conditions in the Nordic Seas remain similar. On the contrary, with increasing FS width Arctic temperatures remain unchanged and salinity changes appear to steadily become stronger. For a sill depth of ~1500 m, we achieve ventilation of the Arctic Ocean due to enhanced import of saline Atlantic water through a FS width of ~105 km. Moreover, at this width and depth, we detect a modern-like three-layer stratification in the Arctic Ocean. The exchange flow through FS is characterized by vertical separation of a low salinity cold outflow from the Arctic Ocean confined to a thin upper layer, an intermediate saline inflow from the Atlantic Ocean below and a cold bottom Arctic outflow. Using a significantly shallower and narrower FS during the early Miocene, our study suggests that the ventilation mechanisms and stratification in the Arctic Ocean are comparable to the present-day characteristics.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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