What is the relationship between benthic 18o and past climate?

Geography

1 answer:

Hatshy [7]3 years ago

6 0

Answer: Its presence is a good determinant of past hot climates. Its absence can also indicate cold climates.

Explanation:

18O and 16O are oxygen Isotopes, and are used in determining past climates. Heavier than the 16O with 10 neutrons and 8 protons, the 18O does not evaporate as easily and because of this, higher amounts are found in the tropics.

Together, they serve as good determinants of past climate by checking for their ratio in fossils.

Also the 18O isotopes are not present in polar regions as they precipitate before getting to higher altitudes. Cold areas, on the other hand, are high in 16O as they get trapped in glaciers. When climate changes in a location, the quantity of both of these oxygen isotopes also changes.

You might be interested in

¿Como se origino la cordillera de los andes?

9966 [12]

Por la interacción de la placa oceánica de Nazca con la parte continental de la placa sudamericana.

7 0

3 years ago

If you are on a beach, you might recognize that a tsunami is approaching because ________.

zvonat [6]

You might recognize that a tsunami is approaching because the ocean tide begins to recede to an extremely low level.

3 0

3 years ago

Why is identifying the epicenter of an earthquake useful?

marysya [2.9K]

Answer:

every earthquake is recorded on numerous seismographs located in different directions. Knowing this helps them calculate the distance from the epicenter to each seismographs. To determine the direction each wave traveled, scientist draw circles around the seismographs locations

7 0

3 years ago

What are the cycles that have historically controlled natural climate variability? List the name of each cycle, its natural time

Verdich [7]

Answer:

As explained below.

Explanation:

Climate oscillation or climate cycles are a recurring oscillation within the global or regional climates and their fluctuations produce varying climatic cells and pressures often occurring on an interannual and multi annular basis.

On a decadal and millennium timescales.Current examples of the ENSO, Pacific oscillation, Antarctica, and arctic oscillation. like ENSO is characterized by flooding and drought conditions and the distribution of extreme conditions in the form of heat and cold waves.

Other cycles like the Piora oscillation, Little ice age, medieval warm period, retreating of glaciers and warming of the planet. All these cycles move on earth from the equator to tropics to temperate to polar areas and the continuous warming and cooling periods have altered the rate of spreading of the seafloor and oceanic basin.

Present warming has drastically created a major change in the evolution of species causing extinction and quick decomposition of resources. The release of carbon and methane gases over these years have raised the greenhouse effect at alarming rates.

5 0

3 years ago

Bolivia is one of two landlocked South American countries. It is bordered by Peru and Chile to the west, Brazil to the north and

kolezko [41]

The answer here would have to be C.

6 0

3 years ago

Read 2 more answers