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  • 1
    Online Resource
    Online Resource
    An Intersectional Approach to Equity, Inequity, and Archaeology : A Pathway through Community
    Cambridge University Press (CUP) ; 2022
    In:  Advances in Archaeological Practice Vol. 10, No. 4 ( 2022-11), p. 382-396
    Details
    In: Advances in Archaeological Practice, Cambridge University Press (CUP), Vol. 10, No. 4 ( 2022-11), p. 382-396
    Abstract: El año 2020 fue un despertar para algunes. Para otres, reiteró la persistente injusticia social en los Estados Unidos. Impulsades por estos eventos, 30 personas diversas se reunieron entre enero y mayo de 2021 para un seminario de un semestre de duración que exploraba la inequidad en la práctica arqueológica. Los debates del seminario destacaron la inequidad y las injusticias sociales que están profundamente arraigadas en la disciplina. Sin embargo, la inequidad en la arqueología a menudo se ignora o se trata de manera limitada como problemas discretos, aunque poco vinculados. Un enfoque amplio de la inequidad en la arqueología reveló que la injusticia es interseccional, con efectos compuestos. A través de los temas generales de individuo, comunidad, teoría y práctica, nosotres (un subconjunto de les participantes del seminario) exploramos la inequidad y su papel en varias facetas de la arqueología, incluidas las relaciones norte-sur, publicación, distribución de recursos, diferencias de clase, accesibilidad, inclusión teorías, servicio a comunidades no arqueológicas, trabajo de campo, tutorías, y más. Nos enfocamos en la creación de una hoja de ruta para comprender la interseccionalidad de los problemas de inequidad y sugerir vías para la educación continua y la participación directa. Argumentamos que la construcción de comunidad—al proporcionar apoyo mutuo y construir alianzas—ofrece un camino para lograr una mayor equidad en nuestra disciplina.
    Type of Medium: Online Resource
    ISSN: 2326-3768
    URL: Article
    DOI: 10.1017/aap.2022.26
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2022
    detail.hit.zdb_id: 2842009-3
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  • 2
    Online Resource
    Online Resource
    An ice‐core proxy for northerly air mass incursions into West Antarctica
    Wiley ; 2012
    In:  International Journal of Climatology Vol. 32, No. 10 ( 2012-08), p. 1455-1465
    Details
    In: International Journal of Climatology, Wiley, Vol. 32, No. 10 ( 2012-08), p. 1455-1465
    Abstract: A 200‐year proxy for northerly air mass incursions (NAMI) into central and western West Antarctica is developed from the examination of 19 shallow (21–150 m deep) Antarctic ice‐core non‐sea‐salt (nss) Ca 2+ concentration records. The NAMI proxy reveals a significant rise in recent decades. This rise is unprecedented for at least the past 200 years and is coincident with anthropogenically driven changes in other large‐scale Southern Hemisphere (SH) environmental phenomena such as greenhouse gas (GHG) induced warming, ozone depletion, and the associated intensification of the SH westerlies. The Hysplit trajectory model is used to examine air mass transport pathways into West Antarctica. Empirical orthogonal function analysis, in combination with trajectory results, suggests that atmospheric circulation is the dominant factor affecting nssCa 2+ concentrations throughout central and western West Antarctica. Ozone recovery will likely weaken the spring‐summer SH westerlies in the future. Consequently, Antarctica could lose one of its best defences against SH GHG warming. Copyright © 2011 Royal Meteorological Society
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v32.10
    DOI: 10.1002/joc.2371
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2012
    detail.hit.zdb_id: 1491204-1
    SSG: 14
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  • 3
    Online Resource
    Online Resource
    Holocene climate variability
    Cambridge University Press (CUP) ; 2004
    In:  Quaternary Research Vol. 62, No. 3 ( 2004-11), p. 243-255
    Details
    In: Quaternary Research, Cambridge University Press (CUP), Vol. 62, No. 3 ( 2004-11), p. 243-255
    Abstract: Although the dramatic climate disruptions of the last glacial period have received considerable attention, relatively little has been directed toward climate variability in the Holocene (11,500 cal yr B.P. to the present). Examination of ?50 globally distributed paleoclimate records reveals as many as six periods of significant rapid climate change during the time periods 9000"8000, 6000"5000, 4200"3800, 3500"2500, 1200"1000, and 600"150 cal yr B.P. Most of the climate change events in these globally distributed records are characterized by polar cooling, tropical aridity, and major atmospheric circulation changes, although in the most recent interval (600"150 cal yr B.P.), polar cooling was accompanied by increased moisture in some parts of the tropics. Several intervals coincide with major disruptions of civilization, illustrating the human significance of Holocene climate variability.
    Type of Medium: Online Resource
    ISSN: 0033-5894 , 1096-0287
    URL: Article
    DOI: 10.1016/j.yqres.2004.07.001
    RVK:
    RA 1000
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2004
    detail.hit.zdb_id: 1471589-2
    detail.hit.zdb_id: 205711-6
    SSG: 13
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  • 4
    Online Resource
    Online Resource
    A 700 year record of Southern Hemisphere extratropical climate variability
    International Glaciological Society ; 2004
    In:  Annals of Glaciology Vol. 39 ( 2004), p. 127-132
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 39 ( 2004), p. 127-132
    Abstract: Annually dated ice cores from West and East Antarctica provide proxies for past changes in atmospheric circulation over Antarctica and portions of the Southern Ocean, temperature in coastal West and East Antarctica, and the frequency of South Polar penetration of El Niño events. During the period AD 1700–1850, atmospheric circulation over the Antarctic and at least portions of the Southern Hemisphere underwent a mode switch departing from the out-of-phase alternation of multi-decadal long phases of EOF1 and EOF2 modes of the 850 hPa field over the Southern Hemisphere (as defined in the recent record by Thompson and Wallace, 2000; Thompson and Solomon, 2002) that characterizes the remainder of the 700 year long record. From AD 1700 to 1850, lower-tropospheric circulation was replaced by in-phase behavior of the Amundsen Sea Low component of EOF2 and the East Antarctic High component of EOF1. During the first phase of the mode switch, both West and East Antarctic temperatures declined, potentially in response to the increased extent of sea ice surrounding both regions. At the end of the mode switch, West Antarctic coastal temperatures rose and East Antarctic coastal temperatures fell, respectively, to their second highest and lowest of the record. Polar penetration of El Niño events increased during the mode switch. The onset of the AD 1700–1850 mode switch coincides with the extreme state of the Maunder Minimum in solar variability. Late 20th-century West Antarctic coastal temperatures are the highest in the record period, and East Antarctic coastal temperatures close to the lowest. Since AD 1700, extratropical regions of the Southern Hemisphere have experienced significant climate variability coincident with changes in both solar variability and greenhouse gases.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.3189/172756404781814249
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 2004
    detail.hit.zdb_id: 2122400-6
    SSG: 14
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  • 5
    Online Resource
    Online Resource
    Solar forcing of the polar atmosphere
    International Glaciological Society ; 2005
    In:  Annals of Glaciology Vol. 41 ( 2005), p. 147-154
    Details
    In: Annals of Glaciology, International Glaciological Society, Vol. 41 ( 2005), p. 147-154
    Abstract: We present highly resolved, annually dated, calibrated proxies for atmospheric circulation from several Antarctic ice cores (ITASE (International Trans-Antarctic Scientific Expedition), Siple Dome, Law Dome) that reveal decadal-scale associations with a South Pole ice-core 10 Be proxy for solar variability over the last 600 years and annual-scale associations with solar variability since AD 1720. We show that increased (decreased) solar irradiance is associated with increased (decreased) zonal wind strength near the edge of the Antarctic polar vortex. The association is particularly strong in the Indian and Pacific Oceans and as such may contribute to understanding climate forcing that controls drought in Australia and other Southern Hemisphere climate events. We also include evidence suggestive of solar forcing of atmospheric circulation near the edge of the Arctic polar vortex based on ice-core records from Mount Logan, Yukon Territory, Canada, and both central and south Greenland as enticement for future investigations. Our identification of solar forcing of the polar atmosphere and its impact on lower latitudes offers a mechanism for better understanding modern climate variability and potentially the initiation of abrupt climate-change events that operate on decadal and faster scales.
    Type of Medium: Online Resource
    ISSN: 0260-3055 , 1727-5644
    URL: Article
    DOI: 10.3189/172756405781813375
    Language: English
    Publisher: International Glaciological Society
    Publication Date: 2005
    detail.hit.zdb_id: 2122400-6
    SSG: 14
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  • 6
    Online Resource
    Online Resource
    Ultra-high resolution snapshots of three multi-decadal periods in an Antarctic ice core
    Cambridge University Press (CUP) ; 2016
    In:  Journal of Glaciology Vol. 62, No. 231 ( 2016-02), p. 31-36
    Details
    In: Journal of Glaciology, Cambridge University Press (CUP), Vol. 62, No. 231 ( 2016-02), p. 31-36
    Abstract: We offer the first sub-seasonal view of glacial age archives from the Siple Dome-A (SDMA) ice core using the ultra-high resolution capabilities of a newly developed laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS; 121 µm sampling resolution) system capable of conducting multi-element glaciochemical analysis. Our ultra-high resolution data demonstrates that: (1) the SDMA ice core record can be annually dated based on seasonality in chemical inputs at a depth not previously possible using previous glaciochemical sampling methods, (2) winter accumulation at the SD site was greater than summer accumulation during the three late glacial periods selected (~15.3, 17.3, 21.4 Ka ago) in this study and (3) resulting annual layer thicknesses results show greater variability than the current SD ice core depth/age model (Brook and others, 2005), possibly due to depositional effects such as wind scouring and/or decadal variability in snow accumulation that is not captured by the resolution of the current depth/age model.
    Type of Medium: Online Resource
    ISSN: 0022-1430 , 1727-5652
    URL: Article
    DOI: 10.1017/jog.2016.5
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2016
    detail.hit.zdb_id: 2140541-4
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  • 7
    Online Resource
    Online Resource
    Evidence for a volcanic underpinning of the Atlantic multidecadal oscillation
    Springer Science and Business Media LLC ; 2018
    In:  npj Climate and Atmospheric Science Vol. 1, No. 1 ( 2018-09-20)
    Details
    In: npj Climate and Atmospheric Science, Springer Science and Business Media LLC, Vol. 1, No. 1 ( 2018-09-20)
    Abstract: The Atlantic multidecadal oscillation (AMO) is a 60–70 year pattern of sea-surface temperature (SST) variability in the North Atlantic commonly ascribed to internal ocean dynamics and changes in northward heat transport. Recent modeling studies, however, suggest that SSTs fluctuate primarily in response to major volcanic eruptions and changes in atmospheric circulation. Here, we utilize historical SST, atmospheric reanalysis, and stratospheric aerosol optical depth data to examine the basic evidence supporting a volcanic link. We find that cool intervals across the North Atlantic coincide with two distinct episodes of explosive volcanic activity (1880s–1920s and 1960s–1990s), where key eruptions include 1883 Krakatau, 1902 Santa María, 1912 Novarupta, 1963 Agung, 1982 El Chichón, and 1991 Pinatubo. Cool SST patterns develop in association with an increased prevalence of North Atlantic Oscillation (NAO)+ atmospheric patterns caused by stratospheric aerosol loading and a steepened poleward temperature gradient. NAO+ patterns promote wind-driven advection, evaporative cooling, and increased albedo from enhanced Saharan dust transport and anthropogenic aerosols. SSTs across the subpolar gyre are regulated by strength of low pressure near Iceland and the associated wind-driven advection of cold surface water from the Labrador Sea. This is contrary to an interpretation that subpolar SSTs are driven by changes in ocean overturning circulation. We also find that North Pacific and global mean SST declines can be readily associated with the same volcanic triggers that affect the North Atlantic. Thus, external forcing from volcanic aerosols appears to underpin multi-decade SST variability observed in the historical record.
    Type of Medium: Online Resource
    ISSN: 2397-3722
    URL: Article
    DOI: 10.1038/s41612-018-0036-6
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 2925628-8
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  • 8
    Online Resource
    Online Resource
    Mount Logan ice core record of tropical and solar influences on Aleutian Low variability: 500–1998 A.D.
    American Geophysical Union (AGU) ; 2014
    In:  Journal of Geophysical Research: Atmospheres Vol. 119, No. 19 ( 2014-10-16)
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 119, No. 19 ( 2014-10-16)
    Abstract: We have developed a 1500 year continuous ice core record of the Aleutian Low The Medieval Climate Anomaly (Little Ice Age) had a weaker (stronger) ALow Our record indicates strong tropical‐extratropical coupling and solar forcing
    Type of Medium: Online Resource
    ISSN: 2169-897X , 2169-8996
    URL: Issue
    URL: Article
    DOI: 10.1002/jgrd.v119.19
    DOI: 10.1002/2014JD021847
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2014
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 2969341-X
    SSG: 16,13
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  • 9
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    Online Resource
    Examination of precipitation variability in southern Greenland
    American Geophysical Union (AGU) ; 2017
    In:  Journal of Geophysical Research: Atmospheres Vol. 122, No. 12 ( 2017-06-27), p. 6202-6216
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 122, No. 12 ( 2017-06-27), p. 6202-6216
    Abstract: Southern Greenland precipitation is largely driven by topography and wind direction Recent enhanced increase of Arctic temperature linked with increase of southwest Greenland precipitation Positive feedback mechanisms in Arctic amplification linked with increase in southwest Greenland precipitation
    Type of Medium: Online Resource
    ISSN: 2169-897X , 2169-8996
    URL: Issue
    URL: Article
    DOI: 10.1002/jgrd.v122.12
    DOI: 10.1002/2016JD026377
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2017
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 2969341-X
    SSG: 16,13
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  • 10
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    Online Resource
    Chemical weathering and controls on atmospheric O2 and CO2: Fundamental principles were enunciated by J.J. Ebelmen in 1845
    Elsevier BV ; 1996
    In:  Geochimica et Cosmochimica Acta Vol. 60, No. 9 ( 1996-5), p. 1633-1637
    Details
    In: Geochimica et Cosmochimica Acta, Elsevier BV, Vol. 60, No. 9 ( 1996-5), p. 1633-1637
    Type of Medium: Online Resource
    ISSN: 0016-7037
    URL: Article
    DOI: 10.1016/0016-7037(96)00104-4
    RVK:
    TE 1000
    Language: English
    Publisher: Elsevier BV
    Publication Date: 1996
    detail.hit.zdb_id: 300305-X
    detail.hit.zdb_id: 1483679-8
    SSG: 13
    SSG: 16,12
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