Search Results - "Milligan, Joseph N"

No Evidence for a Large Atmospheric CO2 Spike Across the Cretaceous‐Paleogene Boundary by Milligan, Joseph N., Royer, Dana L., Franks, Peter J., Upchurch, Garland R., McKee, Melissa L.

“…Currently, there is only one paleo‐CO2 record from plant macrofossils that has sufficient stratigraphic resolution to potentially capture a transient spike…”
Get full text

Quantifying the effect of shade on cuticle morphology and carbon isotopes of sycamores: present and past by Milligan, Joseph N., Flynn, Andrew G., Wagner, Jennifer D., Kouwenberg, Lenny L.R., Barclay, Richard S., Byars, Bruce W., Dunn, Regan E., White, Joseph D., Zechmann, Bernd, Peppe, Daniel J.

“…Premise Reconstructing the light environment and architecture of the plant canopy from the fossil record requires the use of proxies, such as those derived…”
Get full text

Moderate to Elevated Atmospheric CO2 During the Early Paleocene Recorded by Platanites Leaves of the San Juan Basin, New Mexico by Milligan, Joseph N., Flynn, Andrew G., Kowalczyk, Jennifer B., Barclay, Richard S., Geng, Jie, Royer, Dana L., Peppe, Daniel J.

“…Throughout the Phanerozoic, estimated CO2 levels from CO2 proxies generally correlate well with independent estimates of temperature. However, some proxy…”
Get full text

No Evidence for a Large Atmospheric CO 2 Spike Across the Cretaceous‐Paleogene Boundary by Milligan, Joseph N., Royer, Dana L., Franks, Peter J., Upchurch, Garland R., McKee, Melissa L.

“…Abstract Currently, there is only one paleo‐CO 2 record from plant macrofossils that has sufficient stratigraphic resolution to potentially capture a transient…”
Get full text

Plant Cuticle as a Proxy for Paleoecology and Paleoatmospheric Composition: Modern Calibration and Application to the Early Paleocene of the San Juan Basin, New Mexico by Milligan, Joseph N

“…Human alteration of land cover and combustion of fossil fuels has elevated atmospheric CO2, causing the Earth to warm. The geological record provides an…”
Get full text

Moderate to Elevated Atmospheric CO 2 During the Early Paleocene Recorded by Platanites Leaves of the San Juan Basin, New Mexico by Milligan, Joseph N., Flynn, Andrew G., Kowalczyk, Jennifer B., Barclay, Richard S., Geng, Jie, Royer, Dana L., Peppe, Daniel J.

“…Abstract Throughout the Phanerozoic, estimated CO 2 levels from CO 2 proxies generally correlate well with independent estimates of temperature. However, some…”
Get full text