Publications

Zanowski, H.; Jahn, A.; Gu, S.; Liu, Z.; Marchitto, T. M.: Decomposition of deglacial Pacific radiocarbon age controls using an isotope-enabled ocean model. In: Paleoceanography and Paleoclimatology, vol. 37, 2022. (Type: Journal Article | Links)

He, F.; Merrelli, A.; L'Ecuyer, T. S.; Turnbull, M. C.: Climate Outcomes of Earth-similar Worlds as a Function of Obliquity and Rotation Rate. In: The Astrophysical Journal, vol. 993, no. 1, 2022. (Type: Journal Article | Links)

Beal, Maxwell R. W.; O’Reilly, Bryan E.; Soley, Caitlin K.; Hietpas, Kaitlynn R.; Block, Paul J.: Variability of summer cyanobacteria abundance: can season-ahead forecasts improve beach management?. In: Lake and Reservoir Management, vol. 39, no. 1, pp. 37-52, 2022. (Type: Journal Article | Abstract | Links)

Russell, Ann E.; Aide, T. Mitchell; Braker, Elizabeth; Ganong, Carissa N.; Hardin, Rebecca D.; Holl, Karen D.; Hotchkiss, Sara C.; Klemens, Jeffrey A.; Kuprewicz, Erin K.; McClearn, Deedra; Middendorf, George; Ostertag, Rebecca; Powers, Jennifer S.; Willis, Charles G.: Integrating tropical research into biology education is urgently needed. In: PLoS Biology , vol. 20, iss. 6, pp. e3001674, 2022. (Type: Journal Article | Abstract | Links)

Wang, F.; Notaro, M.; Yu, Y.; Mao, J.: Deficient precipitation sensitivity to Sahel land surface forcings among CMIP5 models. In: International Journal of Climatology, pp. 1-24, 2022. (Type: Journal Article | Links)

Vavrus, S. J.; Kucharik, C.; He, F.; Kutzbach, J. E.; Ruddiman, W. F.: Did agriculture beget agriculture during the past several millennia?. In: The Holocene, vol. 32, iss. 7, pp. 680-689, 2022. (Type: Journal Article | Links)

Notaro, M.; Jorns, M. J.; Briley, L.: Representation of lake-atmosphere interactions and lake-effect snowfall in the Laurentian Great Lakes Basin among HighResMIP global climate models. In: Journal of the Atmospheric Sciences, vol. 79, iss. 5, pp. 1325-1347, 2022. (Type: Journal Article | Links)

He, F.; Clark, P. U.: Freshwater forcing of the Atlantic Meridional Overturning Circulation revisited. In: Nature Climate Change, vol. 12, pp. 449–454, 2022. (Type: Journal Article | Links)

Vavrus, S. J.; Wang, F.; Block, P.: Rainy season precipitation forecasts in coastal Peru from the North American Multi-Model Ensemble (NMME). In: International Journal of Climatology, 2022. (Type: Journal Article | Links)

Vavrus, S. J.; Alkama, R.: Future trends of Arctic surface wind speeds and their relationship with sea ice in CMIP5 climate model simulations. In: Climate Dynamics, vol. 59, pp. 1833-1848, 2021. (Type: Journal Article | Links)

Kiefer, M. T.; Andresen, J. A.; McCullough, D. G.; Baule, W. J.; Notaro, M.: Extreme minimum temperatures in the Great Lakes region of the United States: A climatology with implications for insect mortality.. In: International Journal of Climatology, pp. 1-20, 2021. (Type: Journal Article | Links)

Sutheimer, Colleen M.; Meunier, Jed; Hotchkiss, Sara C.; Rebitzke, Eric; Radeloff, Volker C.: Historical fire regimes of North American hemiboreal peatlands. In: Forest Ecology and Management, vol. 498, pp. 119561, 2021. (Type: Journal Article | Links)

Vavrus, S. J.; Holland, M. M.: When will the Arctic Ocean become ice-free?. In: Arctic, Antarctic, and Alpine Research, vol. 53, iss. 1, pp. 217-218, 2021. (Type: Journal Article | Links)

Francis, J.; Vavrus, S.: How is rapid Arctic warming influencing weather patterns in lower latitudes?. In: Arctic, Antarctic, and Alpine Research, vol. 53, iss. 1, pp. 219-220, 2021. (Type: Journal Article | Links)

Notaro, M.; Zhong, Y.; Xue, P.; Peters-Lidard, C.; Cruz, C.; Kemp, E.; Kristovich, D.; Kulie, M.; Wang, J.; Huang, C.; Vavrus, S. V.: Cold season performance of the NU-WRF regional climate model in the Great Lakes region. . In: Journal of Hydrometeorology, vol. 22, pp. 2423-2454, 2021. (Type: Journal Article | Links)

Beal, Maxwell R. W.; O'Reilly, Bryan; Hietpas, Kaitlynn R.; Block, Paul: Development of a sub-seasonal cyanobacteria prediction model by leveraging local and global scale predictors. In: Harmful Algae, vol. 108, pp. 102100, 2021. (Type: Journal Article | Abstract | Links)

Alexander, Sarah; Yang, Guang; Addisu, Girmachew; Block, Paul: Forecast-informed reservoir operations to guide hydropower and agriculture allocations in the Blue Nile basin, Ethiopia. In: International Journal of Water Resources Development, vol. 37, no. 2, pp. 208-233, 2021. (Type: Journal Article | Links)

Barrett, Kevin D.; Sanford, Patricia; Hotchkiss, Sara C.: The ecology of testate amoebae and Cladocera in Hawaiian montane peatlands and development of a hydrological transfer function. In: Journal of Paleolimnology, vol. 66, pp. 83–101, 2021. (Type: Journal Article | Abstract | Links)

@article{Barrett2021,

title = {The ecology of testate amoebae and Cladocera in Hawaiian montane peatlands and development of a hydrological transfer function},

author = {Kevin D. Barrett and Patricia Sanford and Sara C. Hotchkiss },

doi = {https://doi.org/10.1007/s10933-021-00188-8},

year = {2021},

date = {2021-04-08},

journal = {Journal of Paleolimnology},

volume = {66},

pages = {83–101},

abstract = {Peatland complexes in the humid highlands of Hawai‘i are vital refuges of biodiversity and freshwater resources. Hawaiian peat deposits are also rare repositories of terrestrial ecosystem archives located in an otherwise vast expanse of ocean. We investigated the potential for researching the paleohydrological history of Hawaiian montane peatlands on Kohala, Hawai‘i Island through analyses of testate amoebae and Cladocera. Surface peat was collected from a variety of ecohydrological habitats (from water pools to hummocks) and analyzed for modern testate amoeba and cladoceran species relative abundance. We identified 54 morphotype taxa from 21 genera of testate amoebae, 4 taxa and genera of littoral Cladocera, and the common peat rotifer Habrotrocha angusticollis. Testate amoeba diversity and morphotype occurrence mirrored observations from many high-latitude peatland studies. Constrained and unconstrained ordinations support the hypothesis that surface moisture, measured as water-table depth, is an important control on the distribution of testate amoebae and Cladocera in Hawaiian peatlands. Transfer functions relying on weighted-averaging and modern analogs were developed to predict water-table depths from species relative abundance data, and these perform well under leave-one-site-out cross-validation: RMSEP = 9.75–10.3 cm, R2 = 0.56–0.62. Including cladoceran abundance data in the calibration dataset produced modest model improvement: RMSEP = 1–8% and R2 = 2–13%. A weighted-average partial-least-squares transfer function was applied to microfossil assemblages from a 0.5 m-long peat core with a 210Pb decay chronology anchored by ten existing measurements of 210Pb activity and a Bayesian statistical framework. Microfossils were well-preserved in the peat core. The water-table depth optima of an abundant down-core taxa, Hyalosphenia subflava, is not precisely constrained in the calibration data set, but estimates match those of other tropical studies. A reconstruction of water-table depth indicates dry early nineteenth-century conditions, wet conditions in the late 19th to early twentieth centuries, followed by progressive drying for much of the twentieth-century. Testate amoeba composition appears to have been sensitive to severe drought in recent decades. The results signal that assemblages of testate amoebae and Cladocera are useful proxies of Hawaiian peatland paleohydrology and should be considered alongside other archives of Hawaiian environmental history.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

Close

Peatland complexes in the humid highlands of Hawai‘i are vital refuges of biodiversity and freshwater resources. Hawaiian peat deposits are also rare repositories of terrestrial ecosystem archives located in an otherwise vast expanse of ocean. We investigated the potential for researching the paleohydrological history of Hawaiian montane peatlands on Kohala, Hawai‘i Island through analyses of testate amoebae and Cladocera. Surface peat was collected from a variety of ecohydrological habitats (from water pools to hummocks) and analyzed for modern testate amoeba and cladoceran species relative abundance. We identified 54 morphotype taxa from 21 genera of testate amoebae, 4 taxa and genera of littoral Cladocera, and the common peat rotifer Habrotrocha angusticollis. Testate amoeba diversity and morphotype occurrence mirrored observations from many high-latitude peatland studies. Constrained and unconstrained ordinations support the hypothesis that surface moisture, measured as water-table depth, is an important control on the distribution of testate amoebae and Cladocera in Hawaiian peatlands. Transfer functions relying on weighted-averaging and modern analogs were developed to predict water-table depths from species relative abundance data, and these perform well under leave-one-site-out cross-validation: RMSEP = 9.75–10.3 cm, R2 = 0.56–0.62. Including cladoceran abundance data in the calibration dataset produced modest model improvement: RMSEP = 1–8% and R2 = 2–13%. A weighted-average partial-least-squares transfer function was applied to microfossil assemblages from a 0.5 m-long peat core with a 210Pb decay chronology anchored by ten existing measurements of 210Pb activity and a Bayesian statistical framework. Microfossils were well-preserved in the peat core. The water-table depth optima of an abundant down-core taxa, Hyalosphenia subflava, is not precisely constrained in the calibration data set, but estimates match those of other tropical studies. A reconstruction of water-table depth indicates dry early nineteenth-century conditions, wet conditions in the late 19th to early twentieth centuries, followed by progressive drying for much of the twentieth-century. Testate amoeba composition appears to have been sensitive to severe drought in recent decades. The results signal that assemblages of testate amoebae and Cladocera are useful proxies of Hawaiian peatland paleohydrology and should be considered alongside other archives of Hawaiian environmental history.

Close

Barrett, Kevin D.; Sanford, Patricia; Hotchkiss, Sara C.: The ecology of testate amoebae and Cladocera in Hawaiian montane peatlands and development of a hydrological transfer function. In: Journal of Paleolimnology, vol. 66, no. 2, pp. 83–101, 2021. (Type: Journal Article | Links)

Peters, Shanan E; Rowley, David B: Long-Term Evolution of Earth's Continental Surface Elevation. In: EarthArXiv, 2021. (Type: Journal Article | Abstract | Links)