MSC 264 Lecture Notes - Lecture 2: Foraminifera, Carbon 15, Denitrification

24 views2 pages
30 Oct 2017
Department
Course
Professor
Oceanic vertical profile of seawater DIC δ13C is similar to Dissolved oxygen
Which of the following materials has the lowest δ13C value? Organic carbon
δ15N of seawater NO3- may decrease due to the increase of N2 fixation
δ15N of seawater NO3- may increase due to the increase of Water column denitrification
Bulk sedimentary δ15N can be used to understand Water column denitrification and nitrate
utilization in the surface ocean
δ18O of rain at high latitudes is Lower than δ18O of tropical surface water
Data of δ18O recorded in foraminifera CaCO3 shells shows that the glacial ocean has higher
salinity
δ18O recorded in foraminifera C A C O3 shells are controlled mainly by
Temperature of the water where CaCO3 was formed.
Seawater δ18O value.
Polar ice volume.
Data of δ18O and δ13C recorded in foraminifera CaCO3 shells show that the glacial ocean has
Higher δ18O and lower δ13C
δ13C recorded in foraminifera CaCO3 shells can be used to trace
δ13C value of seawater DIC.
Ocean circulation.
Past ocean nutrient content.
Conversion of C between organic carbon and oceanic DIC pools.
True: [δ15N of NO3-] surface SA (60 °S) > [δ15N of NO3-]3000m NA near Bermuda
Biological nitrate uptake causes surface water of high latitude North Atlantic to be more enriched
with δ15N of NO3- than at depth in North Atlantic at mid latitudes
True: [δ18O of seawater] surface mixed NA summer > [δ18O of seawater] 3000 m in the NA
surface atlantic has higher salinity than deep atlantic and therefore has higher d18O of
seawater
FALSE: [δ18O of seawater] surface mixed NP summer > [δ18O of seawater] surface mixed NA summer
find more resources at oneclass.com
find more resources at oneclass.com
Unlock document

This preview shows half of the first page of the document.
Unlock all 2 pages and 3 million more documents.

Already have an account? Log in

Get OneClass Notes+

Unlimited access to class notes and textbook notes.

YearlyBest Value
75% OFF
$8 USD/m
Monthly
$30 USD/m
You will be charged $96 USD upfront and auto renewed at the end of each cycle. You may cancel anytime under Payment Settings. For more information, see our Terms and Privacy.
Payments are encrypted using 256-bit SSL. Powered by Stripe.