1. By Gavin Schmidt (NASA Goddard Institute for Space Studies) "Using Paleo-Climate to Constrain Future Projections"

    This lecture is part of the The Earth Science Colloquium video series. The Earth Science Colloquium Series is sponsored by the Lamont-Doherty Earth Observatory and the Columbia University Department of Earth and Environmental Sciences (DEES). This series provides a lively forum for discussing a wide variety of topics within the earth sciences and related fields. Colloquia are attended by the full range of scientific and technical staff at LDEO.

    # vimeo.com/61427162 Uploaded 66 Plays / / 0 Comments Watch in Couch Mode
  2. By Marie Tharp Fellow ,Camille Li
    (University of Bergen and the Bjerknes Centre for Climate Research)

    This lecture is part of the The Earth Science Colloquium video series. The Earth Science Colloquium Series is sponsored by the Lamont-Doherty Earth Observatory and the Columbia University Department of Earth and Environmental Sciences (DEES). This series provides a lively forum for discussing a wide variety of topics within the earth sciences and related fields. Colloquia are attended by the full range of scientific and technical staff at LDEO.

    # vimeo.com/60670196 Uploaded 37 Plays / / 0 Comments Watch in Couch Mode
  3. Abstract: Prevailing definitions of climate are not much different from “the climate is what you expect, the weather is what you get”. Using a variety of sources including reanalyses and paleo data, and aided by notions and analysis techniques from Nonlinear Geophysics, we argue that this dictum is fundamentally wrong. In addition to the weather and climate, there is a qualitatively distinct intermediate regime extending over a factor of ≈ 1000 in scale. For example, mean temperature fluctuations increase up to about 5 K at 10 days (the lifetime of planetary structures), then decrease to about 0.2 K at 30 years, and then increase again to about 5 K at glacial-interglacial scales.

    Both deterministic GCM’s with fixed forcings (“control runs”) and stochastic turbulence-based models reproduce the first two regimes, but not the third. The middle regime is thus a kind of “macroweather” not “high frequency climate”. Averaging macroweather over periods increasing to ≈ 30 yrs yields apparently converging values: macroweather is “what you expect”. Macroweather averages over ≈30 years have the lowest variability, they yield well defined “climate states” and justify the otherwise ad hoc “climate normal” period. However, moving to longer periods, these states increasingly fluctuate: just as with the weather, the climate changes in an apparently unstable manner; the climate is not what you expect. Similarly, we may categorize climate forcings according to whether their fluctuations decrease or increase with scale and this has important implications for GCM’s and for climate change and climate predictions.

    # vimeo.com/54894153 Uploaded 46 Plays / / 0 Comments Watch in Couch Mode
  4. By Kerry Emanuel (Massachusetts Institute of Technology)

    This lecture is part of the The Earth Science Colloquium video series. The Earth Science Colloquium Series is sponsored by the Lamont-Doherty Earth Observatory and the Columbia University Department of Earth and Environmental Sciences (DEES). This series provides a lively forum for discussing a wide variety of topics within the earth sciences and related fields. Colloquia are attended by the full range of scientific and technical staff at LDEO.

    # vimeo.com/53965866 Uploaded 26 Plays / / 0 Comments Watch in Couch Mode
  5. By Timothy Creyts (Lamont-Doherty Earth Observatory, Columbia University)

    This lecture is part of the The Earth Science Colloquium video series. The Earth Science Colloquium Series is sponsored by the Lamont-Doherty Earth Observatory and the Columbia University Department of Earth and Environmental Sciences (DEES). This series provides a lively forum for discussing a wide variety of topics within the earth sciences and related fields. Colloquia are attended by the full range of scientific and technical staff at LDEO.

    # vimeo.com/53380342 Uploaded 42 Plays / / 0 Comments Watch in Couch Mode

Earth Science Colloquium Series

Lamont Doherty Plus

The Earth Science Colloquium Series is sponsored by the Lamont-Doherty Earth Observatory and the Columbia University Department of Earth and Environmental Sciences (DEES). This series provides a lively forum for discussing a wide variety of topics within


+ More

The Earth Science Colloquium Series is sponsored by the Lamont-Doherty Earth Observatory and the Columbia University Department of Earth and Environmental Sciences (DEES). This series provides a lively forum for discussing a wide variety of topics within the earth sciences and related fields.

Browse This Channel

Shout Box

Channels are a simple, beautiful way to showcase and watch videos. Browse more Channels. Channels