Anne Hope Jahren

• Bostic, Joshua Neilson; Hagopian, William Martin & Jahren, Anne Hope (2018). Carbon and nitrogen stable isotopes in U.S. milk: Insight into production process. Rapid Communications in Mass Spectrometry.  ISSN 0951-4198.  32(7), s 561- 566 . doi: 10.1002/rcm.8069
• Hagopian, William Martin; Schubert, Brian A; Graper, Robert A & Jahren, Anne Hope (2018). Plant growth chamber design for subambient pCO2 and δ13C C studies. Rapid Communications in Mass Spectrometry.  ISSN 0951-4198.  32(15), s 1296- 1302 . doi: 10.1002/rcm.8176
• Liu, Sarah; Moore, Lori B.; Halliday, Tanya M.; Jahren, Anne Hope; Savla, Jyoti; Hedrick, Valisa E.; Marinik, Elaina L. & Davy, Brenda M. (2018). Short-term changes in added sugar consumption by adolescents reflected in the carbon isotope ratio of fingerstick blood. Nutrition and Health.  ISSN 0260-1060.  24(4), s 251- 259 . doi: 10.1177/0260106018799522
• MacDougall, Carly R.; Hill, Catelyn E.; Jahren, Anne Hope; Salva, Jyoti; Riebl, Shaun K.; Hedrick, Valissa E.; Raynor, Hollie A.; Dunsmore, Julie C.; Frisard, Madlyn I. & Davy, Brenda M. (2018). The δ13C Value of Fingerstick Blood Is a Valid, Reliable, and Sensitive Biomarker of Sugar-Sweetened Beverage Intake in Children and Adolescents. Journal of Nutrition.  ISSN 0022-3166.  148, s 147- 152 . doi: 10.1093/jn/nxx017
• Schubert, Brian A & Jahren, Anne Hope (2018). Incorporating the effects of photorespiration into terrestrial paleoclimate reconstruction. Earth-Science Reviews.  ISSN 0012-8252.  177, s 637- 642 . doi: 10.1016/j.earscirev.2017.12.008
• Rabanus-Wallace, M. Timothy; Wooller, Matthew J.; Zazula, Grant D.; Shute, Elen; Jahren, Anne Hope; Kosintsev, Pavel; Burns, James A.; Breen, James; Llamas, Bastien & Cooper, Alan (2017). Megafaunal isotopes reveal role of increased moisture on rangeland during late Pleistocene extinctions. Nature Ecology and Evolution.  ISSN 2397-334X.  1(5) . doi: 10.1038/s41559-017-0125
• Schubert, Brian A; Jahren, Anne Hope; Davydov, Sergei P & Warny, Sophie (2017). The transitional climate of the late Miocene Arctic: Winterdominated precipitation with high seasonal variability. Geology.  ISSN 0091-7613.  45(5), s 447- 450 . doi: 10.1130/G38746.1

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• Jahren, Anne Hope (2017). Alt jeg vet om planter. Gyldendal Norsk Forlag A/S.  ISBN 9788272016363.  359 s.
• Jahren, Anne Hope (ed.) (2017). The Best American Science and Nature Writing 2017. Houghton Mifflin.  ISBN 1328715515.  352 s.

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• Bostic, Joshua Neilson; Hagopian, William Martin; Svensen, Henrik & Jahren, Anne Hope (2019). Predicting seasonal climate using intra-ring stable isotope analysis. Show summary

  By emitting stratospheric sulphur aerosol clouds that dim the light-energy received from the sun, large-scale volcanic eruptions may cause acute changes in global climate that impact both natural ecosystems and human societies. One example is the 536 Event, a prolonged period of darkness and cooling across the northern hemisphere caused by two separate volcanic eruptions in 536 and 540 CE. Recent mean annual temperature (MAT) and mean annual precipitation (MAP) reconstructions suggest that the decade following the 536 event was one of the coldest and wettest of the past two millennia. This cold period likely contributed to the cultural upheavals that occurred in Scandinavia during the 6th century by reducing the geographic range suitable for cereal grain production. However, while annually-resolved MAT and MAP reconstructions are useful for identifying climatic perturbations, they provide limited insight into the effects of such climate anomalies on regional agricultural productivity due to their limited ability to differentiate summer and winter climatic conditions. To accurately estimate the number of days suitable for growing crops, or Growing Degree Days (GDD), seasonal resolution must be achieved by determining the ratio of summer to winter temperature and precipitation. To reconstruct growing season temperature and precipitation across southern Scandinavia in the decade following the 536 event (535-545 CE), we will combine prior reconstructions of annual mean data with novel analyses of summer/winter temperature and precipitation ratios derived from intra-ring carbon and oxygen stable isotope analysis of Picea abies collected from Raknehaugen, a burial mound in southern Norway constructed in 551 CE. These growing season temperature and precipitation estimates will be combined with other geo-climatic data (latitude, altitude etc.) for regional GDD reconstruction to ultimately determine changes in the geographic range suitable for crop production in Southern Norway following the 536/540 double event. Here, we 1.) Provide a conceptual outline of the project’s expected outcomes and 2.) Demonstrate the ability of intra-ring stable isotope analysis to detect short-term seasonal climatic perturbations in Scandinavia by reconstructing the European summer drought of 1959 from estimates of summer/winter temperature and precipitation ratios derived from stable isotope patterns in Picea abies samples from two locations in southern Norway.

• Kvaalen, Harald; Jahren, Anne Hope; Skrøppa, Tore; Yakovlev, Igor & Fossdal, Carl Gunnar (2010). Grana - ein klimaluring med godt epigenetisk minne, I: Severin Woxholtt (red.),  Norsk institutt for skog og landskap. Årsmelding 2010.  Norsk institutt for skog og landskap.  Artikkel.  s 16 - 17 Show summary

  Epigenetikk er eit ord på veg inn i daglegtalen. No definert som arvelege endringar i framtoninga fenotypen) av eit individ som ikkje skuldast endringar i sjølve sekvensen av arvematerialet (DNA.) Epigenetikk er no eit av dei mest omtala forskingsområda i biologien.

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