Proxy indicator. A type of indirect evidence that serves as a substitute for direct measurement and sheds light on past climate. Only $35.99/year. Climate model. A program that combines what is known about the atmosphere and oceans to simulate, or imitate, climate processes.
What is a proxy indicator for climate?
A proxy climate indicator is a local record that is interpreted using physical or biophysical principles to represent some combination of climate-related variations back in time. … Tree-ring records of past climate are precisely dated, annually resolved, and can be well calibrated and verified (Fritts, 1976).
What are proxy indicators?
Also known as an indirect indicator. It is an indirect sign or measure that can approximate or can be representative of a phenomenon without the presence of a direct sign or measure.
What is a climate proxy quizlet?
Terms in this set (85)
preserved physical characteristics of the past that stand in for direct measurements to enable reconstructions of past climates. definition of climate proxies. late 1800s.
Which of the following are types of proxy indicators?
There are four main types of proxy climate indicator, for example, which are historical (oral or written records), biological (records of faunal and floral growth and distribution), geological (terrestrial deposits and features, and marine ocean sediment cores), and glaciological (ice cores).
What is an environmental proxy?
Paleoclimate proxies are physical, chemical and biological materials preserved within the geologic record (in paleoclimate archives) that can be analyzed and correlated with climate or environmental parameters in the modern world.
What are examples of climate proxies?
Organisms, such as diatoms, forams, and coral serve as useful climate proxies. Other proxies include ice cores, tree rings, and sediment cores (which include diatoms, foraminifera, microbiota, pollen, and charcoal within the sediment and the sediment itself).
What are proxy indicators in monitoring and evaluation?
Proxy indicators provide a solution to overcome data gaps on a certain common context indicator. In some cases these data gaps may be only temporary whilst a data collection system is established, or a required monitoring programme implemented (e.g. monitoring of the conservation status of agricultural habitats).
How is pollen used as a climate proxy?
When pollen grains are washed or blown into bodies of water, their tough outer walls allow them to be preserved in sediment layers in the bottoms of ponds, lakes, or oceans. … Not only can pollen records tell us about the past climate, but they can also tell us how we are impacting our climate.
Which of the following proxy indicators could provide local scale climate information extending back up to a few hundred thousand years?
Tree rings are used to reconstruct annual, and seasonal climatic variations, up to thousands of years before human records. Why use tree rings as proxies?
Which of the following can be used as proxy records for past climate?
These proxy data are preserved physical characteristics of the environment that can stand in for direct measurements. Paleoclimatologists gather proxy data from natural recorders of climate variability such as tree rings, ice cores, fossil pollen, ocean sediments, corals and historical data.
The cause of current climate change is largely human activity, like burning fossil fuels, like natural gas, oil, and coal. Burning these materials releases what are called greenhouse gases into Earth’s atmosphere. … Carbon emissions from fossils fuels like these have been linked to global warming and climate change.
Which of the following is a result of global climate change?
Effects that scientists had predicted in the past would result from global climate change are now occurring: loss of sea ice, accelerated sea level rise and longer, more intense heat waves.
Which of the following can be used as proxies for historical climate data on Earth quizlet?
We can use Proxy Data (clues in natural records). Sediments at the bottom of oceans, locked in coral reefs, preserved in rings of trees, frozen in glaciers and ice caps. How do the following methods/resources give us information about the past climates? Instruments, tree rings, ocean and lake sediments, ice cores.
How accurate are climate proxies?
Overall, any individual proxy is not a reliable indicator. It’s the combination of multiple proxies that provides a clearer picture. If we were to only look at tree-rings, we could not possibly trust on them as a reliable source, since they have known problems.
What are proxy data and why are they necessary in the study of climate change quizlet?
Proxy data are indirect evidence of past climates taken from natural recorders of climate variability. These data are necessary because direct measurements of past climates are limited to the recent past.