ORCID Profile
0000-0002-4123-6998
Current Organisation
Oregon State University
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Publisher: American Geophysical Union (AGU)
Date: 28-06-2019
DOI: 10.1029/2019GL083035
Publisher: American Medical Association (AMA)
Date: 05-2017
DOI: 10.1001/JAMAONCOL.2016.4851
Abstract: A major challenge in value-based health care is the lack of standardized health outcomes measurements, hindering optimal monitoring and comparison of the quality of health care across different settings globally. The International Consortium for Health Outcomes Measurement (ICHOM) assembled a multidisciplinary international working group, comprised of 26 health care providers and patient advocates, to develop a standard set of value-based patient-centered outcomes for breast cancer (BC). The working group convened via 8 teleconferences and completed a follow-up survey after each meeting. A modified 2-round Delphi method was used to achieve consensus on the outcomes and case-mix variables to be included. Patient focus group meetings (8 early or metastatic BC patients) and online anonymized surveys of 1225 multinational BC patients and survivors were also conducted to obtain patients' input. The standard set encompasses survival and cancer control, and disutility of care (eg, acute treatment complications) outcomes, to be collected through administrative data and/or clinical records. A combination of multiple patient-reported outcomes measurement (PROM) tools is recommended to capture long-term degree of health outcomes. Selected case-mix factors were recommended to be collected at baseline. The ICHOM will endeavor to achieve wide buy-in of this set and facilitate its implementation in routine clinical practice in various settings and institutions worldwide.
Publisher: Springer Science and Business Media LLC
Date: 13-08-2018
Publisher: Geological Society of America
Date: 09-01-2017
DOI: 10.1130/G38836.1
Publisher: Geological Society of America
Date: 2016
Publisher: Oxford University Press (OUP)
Date: 07-2015
DOI: 10.1093/GJI/GGV204
Publisher: Elsevier BV
Date: 11-2013
Publisher: American Geophysical Union (AGU)
Date: 19-09-2022
DOI: 10.1029/2022GL099115
Abstract: Since the 1700 CE Cascadia Subduction Zone earthquake and associated coseismic subsidence and tsunami, vegetated intertidal habitats have reestablished across Pacific Northwest estuaries, yet timescales and mechanisms of recovery are uncertain. We investigated the timescale of salt marsh reestablishment in Netarts Bay, Oregon following the 1700 CE earthquake using a combination of excess 210 Pb, 14 C, stratigraphic constraints, and Bayesian age‐depth modeling. Coseismic subsidence lowered the area to low/mid marsh, which persisted for 200 years before transition to modern high marsh. The modern high marsh now appears in dynamic equilibrium with modern sea level rise. In addition to serving as a methodological proof of concept for dating the past 300 years, these results provide insight into intertidal morphodynamic response to large perturbations along tectonically active margins.
Publisher: Geological Society of America
Date: 27-03-2017
DOI: 10.1130/G38479.1
Publisher: Proceedings of the National Academy of Sciences
Date: 23-11-2015
Abstract: In coastal Alaska and the St. Elias orogen, over the past 1.2 million years, mass flux leaving the mountains due to glacial erosion exceeds the plate tectonic input. This finding underscores the power of climate in driving erosion rates, potential feedback mechanisms linking climate, erosion, and tectonics, and the complex nature of climate−tectonic coupling in transient responses toward longer-term dynamic equilibration of landscapes with ever-changing environments.
Publisher: American Association for the Advancement of Science (AAAS)
Date: 06-11-2020
Abstract: Walczak et al. report that increases in Pacific Ocean ventilation and periods of rapid production of icebergs from the Cordilleran Ice Sheet during the last glacial period preceded episodic iceberg discharges into the Atlantic Ocean (see the Perspective by Jaeger and Shevenell). Marine sediments from the Gulf of Alaska show that increases in vertical mixing of the ocean there correspond with intense iceberg calving from the ice sheet that covered much of high-latitude western North America and that these changes occurred before the analogous Heinrich events in the North Atlantic. Thus, these Pacific climate system reorganizations may have been an early part of a cascade of dynamic climate events with global repercussions. Science , this issue p. 716 see also p. 662
Publisher: American Association for the Advancement of Science (AAAS)
Date: 28-02-2020
Abstract: Deglacial meltwater input to the North Pacific contributed to abrupt Northern Hemisphere climate events.
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 10-2017
Publisher: American Geophysical Union (AGU)
Date: 13-10-2010
DOI: 10.1029/2009GB003745
Publisher: Elsevier BV
Date: 09-2017
Publisher: Springer Science and Business Media LLC
Date: 11-2015
DOI: 10.1038/NATURE15753
Abstract: Marine sediments from the North Pacific document two episodes of expansion and strengthening of the subsurface oxygen minimum zone (OMZ) accompanied by seafloor hypoxia during the last deglacial transition. The mechanisms driving this hypoxia remain under debate. We present a new high-resolution alkenone palaeotemperature reconstruction from the Gulf of Alaska that reveals two abrupt warming events of 4-5 degrees Celsius at the onset of the Bølling and Holocene intervals that coincide with sudden shifts to hypoxia at intermediate depths. The presence of diatomaceous laminations and hypoxia-tolerant benthic foraminiferal species, peaks in redox-sensitive trace metals, and enhanced (15)N/(14)N ratio of organic matter, collectively suggest association with high export production. A decrease in (18)O/(16)O values of benthic foraminifera accompanying the most severe deoxygenation event indicates subsurface warming of up to about 2 degrees Celsius. We infer that abrupt warming triggered expansion of the North Pacific OMZ through reduced oxygen solubility and increased marine productivity via physiological effects following initiation of hypoxia, remobilization of iron from hypoxic sediments could have provided a positive feedback on ocean deoxygenation through increased nutrient utilization and carbon export. Such a biogeochemical lification process implies high sensitivity of OMZ expansion to warming.
Publisher: American Geophysical Union (AGU)
Date: 06-2011
DOI: 10.1029/2010PA002051
Publisher: Informa UK Limited
Date: 2020
Publisher: American Association for the Advancement of Science (AAAS)
Date: 18-11-2022
Abstract: Using new and published marine fossil radiocarbon ( 14 C/C) measurements, a tracer uniquely sensitive to circulation and air-sea gas exchange, we establish several benchmarks for Atlantic, Southern, and Pacific deep-sea circulation and ventilation since the last ice age. We find the most 14 C-depleted water in glacial Pacific bottom depths, rather than the mid-depths as they are today, which is best explained by a slowdown in glacial deep-sea overturning in addition to a “flipped” glacial Pacific overturning configuration. These observations cannot be produced by changes in air-sea gas exchange alone, and they underscore the major role for changes in the overturning circulation for glacial deep-sea carbon storage in the vast Pacific abyss and the concomitant drawdown of atmospheric CO 2 .
Publisher: American Geophysical Union (AGU)
Date: 09-02-2012
DOI: 10.1029/2011PA002161
No related grants have been discovered for Maureen Walczak.