Transport Timescales in Geophysical Flows
Quantifying the transport in the stratosphere, oceans, lakes and
groundwater is important for understanding/modeling the flow,
biochemical cycling, distribution of constituents, and the
infiltration of pollutants. An important aspect of this transport is
the time for transport from the surface to interior locations.
Because of mixing there is not a single surface-to-interior transit
time, rather there is a distribution of transit times. These transit time distributions (TTDs) are
fundamental descriptors of the transport. Although, these
distributions cannot be measured directly, information on transport
times can be inferred from chemical tracers with time varying sources
or sinks, so called "transient tracers"
. The TTD framework has been used together with tracer
observations to quantify transit times in the stratosphere, Lake
Issyk-Kul , and the North Atlantic Ocean
. Furthermore, given estimates of TTDs it is possible to infer the
infiltration of pollutants tracers into the geophysical systems,
e.g., chlorine into the stratosphere
and anthropogenic carbon into the oceans .
2. Transit Time Distributions
3. Transient Tracers and Tracer Ages
5. Lake Issyk-Kul
6. North Atlantic Ocean
7. Anthropogenic Carbon in the Oceans
See papers for full details.