Donatella Zona
Biographic Data
| ID | 6820605 |
|---|---|
| NAME | Donatella Zona |
| GIVEN NAMES | Donatella |
| FAMILY NAME | Zona |
| SIGNATURE | ZONA D |
| AFFILIATIONS | San Diego State University |
| ORCID | 0000-0002-0003-4839 |
| VERIFIED | Yes |
| TOTAL WORKS | 7 |
| TOTAL CITATIONS | 0 |
| AUTHOR COUNT | 7 |
| EDITOR COUNT | 0 |
| FIRST PUBLICATION YEAR | 2019 |
| LATEST PUBLICATION YEAR | 2023 |
| H-INDEX | 0 |
Focus on Arctic change
Widespread deepening of the active layer in northern permafrost regions from 2003 to 2020
The changing thermal state of permafrost is an important indicator of climate change in northern high latitude ecosystems. The seasonally thawed soil active layer thickness (ALT) overlying permafrost may be deepening as a consequence of enhanced polar warming and widespread permafrost thaw in northern permafrost regions (NPRs). The associated increase in ALT may have cascading effects on ecological and hydrological processes that impact climate f…
Evaluating photosynthetic activity across Arctic-Boreal land cover types using solar-induced fluorescence
Photosynthesis of terrestrial ecosystems in the Arctic-Boreal region is a critical part of the global carbon cycle. Solar-induced chlorophyll Fluorescence (SIF), a promising proxy for photosynthesis with physiological insight, has been used to track gross primary production (GPP) at regional scales. Recent studies have constructed empirical relationships between SIF and eddy covariance-derived GPP as a first step to predicting global GPP. However…
Soil respiration strongly offsets carbon uptake in Alaska and Northwest Canada
Soil respiration (i.e. from soils and roots) provides one of the largest global fluxes of carbon dioxide (CO 2 ) to the atmosphere and is likely to increase with warming, yet the magnitude of soil respiration from rapidly thawing Arctic-boreal regions is not well understood. To address this knowledge gap, we first compiled a new CO 2 flux database for permafrost-affected tundra and boreal ecosystems in Alaska and Northwest Canada. We then used th…
Seasonality buffers carbon budget variability across heterogeneous landscapes in Alaskan Arctic Tundra
Arctic tundra exhibits large landscape heterogeneity in microtopography, hydrology, and active layer depth. While many carbon flux measurements and experiments are done at or below the mesoscale (1 km), modern ecosystem carbon modeling is often done at scales of 0.25 -1.0 latitude, creating a mismatch between processes, process input data, and verification data. Here we arrange the naturally complex terrain into mesoscale landscape types of varyi…
Understanding spatial variability of methane fluxes in Arctic wetlands through footprint modelling
The Arctic is warming at twice the rate of the global mean. This warming could further stimulate methane (CH 4 ) emissions from northern wetlands and enhance the greenhouse impact of this region. Arctic wetlands are extremely heterogeneous in terms of geochemistry, vegetation, microtopography, and hydrology, and therefore CH 4 fluxes can differ dramatically within the metre scale. Eddy covariance (EC) is one of the most useful methods for estimat…
Arctic greening associated with lengthening growing seasons in Northern Alaska
Many studies have reported that the Arctic is greening; however, we lack an understanding of the detailed patterns and processes that are leading to this observed greening. The normalized difference vegetation index (NDVI) is used to quantify greening, which has had largely positive trends over the last few decades using low spatial resolution satellite imagery such as AVHRR or MODIS over the pan-Arctic region. However, substantial fine scale spa…
No prominent works on this page.
Understanding spatial variability of methane fluxes in Arctic wetlands through footprint modelling
The Arctic is warming at twice the rate of the global mean. This warming could further stimulate methane (CH 4 ) emissions from northern wetlands and enhance the greenhouse impact of this region. Arctic wetlands are extremely heterogeneous in terms of geochemistry, vegetation, microtopography, and hydrology, and therefore CH 4 fluxes can differ dramatically within the metre scale. Eddy covariance (EC) is one of the most useful methods for estimat…
Arctic greening associated with lengthening growing seasons in Northern Alaska
Many studies have reported that the Arctic is greening; however, we lack an understanding of the detailed patterns and processes that are leading to this observed greening. The normalized difference vegetation index (NDVI) is used to quantify greening, which has had largely positive trends over the last few decades using low spatial resolution satellite imagery such as AVHRR or MODIS over the pan-Arctic region. However, substantial fine scale spa…
Soil respiration strongly offsets carbon uptake in Alaska and Northwest Canada
Soil respiration (i.e. from soils and roots) provides one of the largest global fluxes of carbon dioxide (CO 2 ) to the atmosphere and is likely to increase with warming, yet the magnitude of soil respiration from rapidly thawing Arctic-boreal regions is not well understood. To address this knowledge gap, we first compiled a new CO 2 flux database for permafrost-affected tundra and boreal ecosystems in Alaska and Northwest Canada. We then used th…
Seasonality buffers carbon budget variability across heterogeneous landscapes in Alaskan Arctic Tundra
Arctic tundra exhibits large landscape heterogeneity in microtopography, hydrology, and active layer depth. While many carbon flux measurements and experiments are done at or below the mesoscale (1 km), modern ecosystem carbon modeling is often done at scales of 0.25 -1.0 latitude, creating a mismatch between processes, process input data, and verification data. Here we arrange the naturally complex terrain into mesoscale landscape types of varyi…
Evaluating photosynthetic activity across Arctic-Boreal land cover types using solar-induced fluorescence
Photosynthesis of terrestrial ecosystems in the Arctic-Boreal region is a critical part of the global carbon cycle. Solar-induced chlorophyll Fluorescence (SIF), a promising proxy for photosynthesis with physiological insight, has been used to track gross primary production (GPP) at regional scales. Recent studies have constructed empirical relationships between SIF and eddy covariance-derived GPP as a first step to predicting global GPP. However…
Focus on Arctic change
Widespread deepening of the active layer in northern permafrost regions from 2003 to 2020
The changing thermal state of permafrost is an important indicator of climate change in northern high latitude ecosystems. The seasonally thawed soil active layer thickness (ALT) overlying permafrost may be deepening as a consequence of enhanced polar warming and widespread permafrost thaw in northern permafrost regions (NPRs). The associated increase in ALT may have cascading effects on ecological and hydrological processes that impact climate f…
Environmental Science (7 works) · Arctic (6 works) · Climate change and permafrost (6 works) · Geology (6 works) · Atmospheric sciences (5 works) · Cryospheric studies and observations (5 works) · Ecology (5 works) · Ecosystem (4 works) · Geography (4 works) · Tundra (4 works)