Climate risk index shows threats to 90 per cent of the world's marine species
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Labor's plan to save threatened species is an improvement – but it's still well short of what we need
Fri 18 Nov 16:00: APS DFD - no seminar
Abstract not available
- Speaker: Speaker to be confirmed
- Friday 18 November 2022, 16:00-17:00
- Venue: MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.
- Series: Fluid Mechanics (DAMTP); organiser: Prof. Jerome Neufeld.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Thu 06 Oct 18:45: What midges can tell us about past environments Admission Free
Stefan Engels is a palaeoecologist who studies the response of natural ecosystems to abrupt environmental change.
In this talk Stefan will explain how fossils of chironomids (non-biting midges) can be used to tell us more about past climate change and how they can contribute to a better understanding of Insect Armageddon.
Admission Free
- Speaker: Stefan Engels, Birkbeck, University of London
- Thursday 06 October 2022, 18:45-20:30
- Venue: David Attenborough Building, New Museums Site (NOT Dept Geography).
- Series: Cambridge Natural History Society; organiser: events.
Fri 07 Oct 10:00: Ocean water masses reveal the geographic pattern of water cycle change
Anthropogenic climate change threatens to disrupt the global water cycle and consequently the human and ecological systems which rely on freshwater. Salinity observations offer a route to quantifying historical water cycle change in the face of scarce direct observations of rainfall, runoff and evaporation. Due to the dynamic nature of ocean circulation and mixing, however, robustly relating local (i.e. in a Eulerian reference frame) surface salinity changes to local fresh water fluxes remains challenging. In this presentation, we harness water mass-based methods to define insightful metrics for water cycle change based on ocean salinity observations.
First, we explore whether fresh regions of the ocean are getting fresher and salty regions are getting saltier by analysing the distribution of sea water as a function of salinity. As the contrast between fresh and salty regions intensifies, the distribution becomes wider. This widening in the distribution can be expressed as a metric which can be attributed to water cycle change.
Second, we investigate the climatological regions these changes in fresh water transport occur between, namely, the hot tropics, warm sub-tropical regions or cool sub-polar regions. To do this we consider the ‘T-S’ curve of classical oceanography. From 1970 to 2014, the T-S curve has become ‘curvier’, indicating a dramatic shift in fresh water from the warm to cold oceans – a trend not captured by climate reconstructions.
Finally, we present a new method based on optimal transport theory which allows us to attribute air-sea water flux changes to geographically distinct regions. The method optimises the contributions of mixing, circulation and air-sea heat and fresh water fluxes necessary to explain observed changes in the ocean’s water mass distribution. Based on this approach, we provide new estimates of the geographical distribution of water flux changes over the ocean surface.
- Speaker: Jan Zika, UNSW Sydney
- Friday 07 October 2022, 10:00-11:00
- Venue: https://ukri.zoom.us/j/96428101551; BAS Seminar Room 2.
- Series: British Antarctic Survey - Polar Oceans seminar series; organiser: Dr. Shenjie Zhou.
Fri 07 Oct 10:00: Ocean water masses reveal the geographic pattern of water cycle change
Anthropogenic climate change threatens to disrupt the global water cycle and consequently the human and ecological systems which rely on freshwater. Salinity observations offer a route to quantifying historical water cycle change in the face of scarce direct observations of rainfall, runoff and evaporation. Due to the dynamic nature of ocean circulation and mixing, however, robustly relating local (i.e. in a Eulerian reference frame) surface salinity changes to local fresh water fluxes remains challenging. In this presentation, we harness water mass-based methods to define insightful metrics for water cycle change based on ocean salinity observations.
First, we explore whether fresh regions of the ocean are getting fresher and salty regions are getting saltier by analysing the distribution of sea water as a function of salinity. As the contrast between fresh and salty regions intensifies, the distribution becomes wider. This widening in the distribution can be expressed as a metric which can be attributed to water cycle change.
Second, we investigate the climatological regions these changes in fresh water transport occur between, namely, the hot tropics, warm sub-tropical regions or cool sub-polar regions. To do this we consider the ‘T-S’ curve of classical oceanography. From 1970 to 2014, the T-S curve has become ‘curvier’, indicating a dramatic shift in fresh water from the warm to cold oceans – a trend not captured by climate reconstructions.
Finally, we present a new method based on optimal transport theory which allows us to attribute air-sea water flux changes to geographically distinct regions. The method optimises the contributions of mixing, circulation and air-sea heat and fresh water fluxes necessary to explain observed changes in the ocean’s water mass distribution. Based on this approach, we provide new estimates of the geographical distribution of water flux changes over the ocean surface.
- Speaker: Jan Zika, UNSW Sydney
- Friday 07 October 2022, 10:00-11:00
- Venue: https://ukri.zoom.us/j/96428101551; BAS Seminar Room 2.
- Series: British Antarctic Survey - Polar Oceans seminar series; organiser: Dr. Shenjie Zhou.
Fri 07 Oct 10:00: Ocean water masses reveal the geographic pattern of water cycle change
Anthropogenic climate change threatens to disrupt the global water cycle and consequently the human and ecological systems which rely on freshwater. Salinity observations offer a route to quantifying historical water cycle change in the face of scarce direct observations of rainfall, runoff and evaporation. Due to the dynamic nature of ocean circulation and mixing, however, robustly relating local (i.e. in a Eulerian reference frame) surface salinity changes to local fresh water fluxes remains challenging. In this presentation, we harness water mass-based methods to define insightful metrics for water cycle change based on ocean salinity observations.
First, we explore whether fresh regions of the ocean are getting fresher and salty regions are getting saltier by analysing the distribution of sea water as a function of salinity. As the contrast between fresh and salty regions intensifies, the distribution becomes wider. This widening in the distribution can be expressed as a metric which can be attributed to water cycle change.
Second, we investigate the climatological regions these changes in fresh water transport occur between, namely, the hot tropics, warm sub-tropical regions or cool sub-polar regions. To do this we consider the ‘T-S’ curve of classical oceanography. From 1970 to 2014, the T-S curve has become ‘curvier’, indicating a dramatic shift in fresh water from the warm to cold oceans – a trend not captured by climate reconstructions.
Finally, we present a new method based on optimal transport theory which allows us to attribute air-sea water flux changes to geographically distinct regions. The method optimises the contributions of mixing, circulation and air-sea heat and fresh water fluxes necessary to explain observed changes in the ocean’s water mass distribution. Based on this approach, we provide new estimates of the geographical distribution of water flux changes over the ocean surface.
- Speaker: Jan Zika, UNSW Sydney
- Friday 07 October 2022, 10:00-11:00
- Venue: https://ukri.zoom.us/j/96428101551; BAS Seminar Room 2.
- Series: British Antarctic Survey - Polar Oceans seminar series; organiser: Dr. Shenjie Zhou.
Fri 07 Oct 10:00: Ocean water masses reveal the geographic pattern of water cycle change
Anthropogenic climate change threatens to disrupt the global water cycle and consequently the human and ecological systems which rely on freshwater. Salinity observations offer a route to quantifying historical water cycle change in the face of scarce direct observations of rainfall, runoff and evaporation. Due to the dynamic nature of ocean circulation and mixing, however, robustly relating local (i.e. in a Eulerian reference frame) surface salinity changes to local fresh water fluxes remains challenging. In this presentation, we harness water mass-based methods to define insightful metrics for water cycle change based on ocean salinity observations.
First, we explore whether fresh regions of the ocean are getting fresher and salty regions are getting saltier by analysing the distribution of sea water as a function of salinity. As the contrast between fresh and salty regions intensifies, the distribution becomes wider. This widening in the distribution can be expressed as a metric which can be attributed to water cycle change.
Second, we investigate the climatological regions these changes in fresh water transport occur between, namely, the hot tropics, warm sub-tropical regions or cool sub-polar regions. To do this we consider the ‘T-S’ curve of classical oceanography. From 1970 to 2014, the T-S curve has become ‘curvier’, indicating a dramatic shift in fresh water from the warm to cold oceans – a trend not captured by climate reconstructions.
Finally, we present a new method based on optimal transport theory which allows us to attribute air-sea water flux changes to geographically distinct regions. The method optimises the contributions of mixing, circulation and air-sea heat and fresh water fluxes necessary to explain observed changes in the ocean’s water mass distribution. Based on this approach, we provide new estimates of the geographical distribution of water flux changes over the ocean surface.
- Speaker: Jan Zika, UNSW Sydney
- Friday 07 October 2022, 10:00-11:00
- Venue: https://ukri.zoom.us/j/96428101551; BAS Seminar Room 2.
- Series: British Antarctic Survey - Polar Oceans seminar series; organiser: Dr. Shenjie Zhou.
Fri 14 Oct 16:00: Instability, mixing and fragmentation in planetary collisions
The Earth formed by high-energy collisions between planetary embryos. I will present laboratory experiments on the fluid dynamics of these collisions. I will show that the impact of a liquid volume onto a liquid pool reproduces the cratering observed in numerical simulations and at the surface of planets. Unlike simulations, experiments produce turbulent mixing. From our findings, we infer the drop size and the degree of mixing within the forming Earth. These parameters controlled the composition of the Earth’s interior.
- Speaker: Maylis Landeau, IPGP
- Friday 14 October 2022, 16:00-17:00
- Venue: MR2, Centre for Mathematical Sciences, Wilberforce Road, Cambridge.
- Series: Fluid Mechanics (DAMTP); organiser: Prof. Jerome Neufeld.