Departamento de Física Aplicada
Área de Física de la Tierra
Dirección:
Edificio Campus Auga.
Universidade de Vigo, Campus Sur.
Rúa Canella da Costa da Vela 12
32004 Ourense, España
Despacho: 2.5
e-mail: j.anhel@uvigo.gal
Teléfono: +34 988 387 235
Scopus ID: 6507562207
ORCID iD: 0000-0003-2448-4647
WoS ResearcherID: N-1866-2019
Web personal : https://ephyslab.uvigo.es/juan/
Líneas de Investigación
- Impactos del cambio climático
- Estudio de la tropopausa
- Alta troposfera-baja estratosfera
- Energías renovables
- Meteorología extrema
- Dinámica atmosférica
- Recuperación de datos instrumentales
- Ciencias computacionales en investigación científica
Publicaciones
J. Lastovicka, L. Qian, J.A. Añel, M. K. Brown, I. Cnossen, A. G. Elias, C. Jacobi, T. Li, F-J Lübken, M. G. Mlynczak, P. Sacha, V. Sofieva, S.-R. Zhang, (2026) Scenario of global climate change in the Stratosphere-Mesosphere-Thermosphere-Ionosphere system, PLOS Climate, DOI: 10.1371/journal.pclm.0000836 (Published) [pdf]
V.M. Chavez-Perez, J.A. Añel, C. Almaguer-Gómez, L. de la Torre (2025) Temporal Variability of Major Stratospheric Sudden Warmings in CMIP5 Climate Change Scenarios, Climate, Vol. 13, Issue 10 ; DOI: 10.3390/cli13100207 (Published) [pdf]
S. Zhou, Y. Wu, Y. Liu, Y. Gao, P. Yu, R. Xu, G. Chen, T. Ye, W. Yu, J.A. Añel, P. Bi, A. Bone, K. L. Ebi, A. Gasparrini, M. Hashizume, O. Jay, Y. Kim, S. Perkins-Kirkpatrick, J. Kai Wei Lee, T. Li, S. Lin, L. Madaniyazi, J. Park, F. Petrakopoulou, X. Seposo, A. Tobias, S. Li, Y. Guo (2025) Lethal Heat and Humidity Events, Annual Review of Environment and Resources, Vol. 50 ; DOI: 10.1146/annurev-environ-111523-102139 (Published) [pdf]
J.A. Añel, J. C. Antuña-Marrero, A. Cid Samamed, C. Pérez-Souto, L. de la Torre, M.A. Valente, Y. Brugnara, A. Saiz-Lopez, L. Gimeno (2025) Nineteenth- and twentieth-century semi-quantitative surface ozone along subtropical European to tropical Africa Atlantic coasts, Earth System Science Data, Vol. 17, Issue 6, 2437-2446 ; DOI: 10.5194/essd-17-2437-2025 (Published) [pdf]
V.M. Chavez-Perez, J.A. Añel, C. Almaguer-Gómez, L. de la Torre (2025) Influence of Satellite and Presatellite Periods on the Validation of Major Sudden Stratospheric Warmings in Historical CMIP5 Simulations, Atmosphere, Vol. 16 , Issue 5 ; DOI: 10.3390/atmos16050628 (Published) [pdf]
J.A. Añel (2025) Preserve access to crucial climate data, Nature, Reader´s letter / Carta del lector Vol. 641, 39 ; DOI: 10.1038/d41586-025-01328-0 (Published) [pdf]
J.A. Añel, I. Cnossen, J. C. Antuña-Marrero, G. Beig, M. K. Brown, E. Doornbos, S. Osprey, S. M. Mutschler, C. Pérez-Souto, P. Sacha, V. Sofieva, L. de la Torre, S.-R. Zhang,, M. G. Mlynczak (2025) The Need for Better Monitoring of Climate Change in the Middle and Upper Atmosphere, AGU Advances, Vol. 6, Issue 2; DOI: 10.1029/2024AV001465 (Published) [pdf]
A. Saiz-Lopez, C. A. Cuevas, A. Ulises Acuña, J.A. Añel, A. S. Mahajan, L. de la Torre, W. Feng, J. Z. Dávalos, D. Roca-Sanjuán, D. E. Kinnison, J. Carmona-García, R. P. Fernandez, Q. Li, J. E. Sonke, A. Feinberg, J. C. Gómez Martín, J. Villamayor, P. Zhang, Y. Zhang, C. S. Blaszczak-Boxe, O. Travnikov, F. Wang, J. Bieser, J. S. Francisco, J. M. C. Plane (2025) Role of the stratosphere in the global mercury cycle, Science Advances, Vol. 11, 2 ; DOI: 10.1126/sciadv.ads1459 (Published) [pdf]
M. García-Rodríguez, J.A. Añel, J. Rodeiro Iglesias (2024) Assessing and improving the quality of Fortran code in scientific software: FortranAnalyser, Software Impacts, Vol. 21, 100692; DOI: 10.1016/j.simpa.2024.100692 (Published) [pdf]
J.A. Añel, C. Pérez-Souto, M. Pansera, L. de la Torre (2024) ODEÓN workshop: co-creation of research on climate intervention techniques through citizen engagement, Weather, DOI: 10.1002/wea.4542 (Published) [pdf]
J.A. Añel, C. Pérez-Souto, S. Bayo-Besteiro, L. Prieto-Godino, H. Bloomfield, A. Troccoli, L. de la Torre (2024) Extreme weather events and the energy sector in 2021, Weather Climate and Society, DOI: 10.1175/WCAS-D-23-0115.1 (Published) [pdf]
T. Fuentes-Alvarez, P. M. González-Jardines, J. C. Fernández-Álvarez, L. de la Torre, J.A. Añel (2023) Analysis of the Gálvez–Davison Index for the Forecasting Formation and Evolution of Convective Clouds in the Tropics: Western Cuba, Climate, Vol. 11, Issue: 10 ; DOI: 10.3390/cli11100209 (Published) [pdf]
S. Bayo-Besteiro, L. de la Torre, X. Costoya, M. Gómez-Gesteira, A. Pérez-Alarcón, M. deCastro, J.A. Añel (2023) Photovoltaic power resource at the Atacama Desert under climate change, Renewable Energy, Vol. 216, 118999 ; DOI: 10.1016/j.renene.2023.118999 (Published) [pdf]
Q. Li, D. Meidan, P. Hess, J.A. Añel, C. A. Cuevas, S. Doney, R. P. Fernandez, M. van Herpen, L. Höglund-Isaksson, M. S. Johnson, D. E. Kinnison, Jean-François Lamarque, T. Röckmann,, N. M. Mahowald, A. Saiz-Lopez (2023) Global environmental implications of atmospheric methane removal through chlorine-mediated chemistry-climate interactions, Nature Communications, Vol. 14, 4045; DOI: 10.1038/s41467-023-39794-7 (Published) [pdf]
J.A. Añel (2023) Atmosphere. The Environment in Galicia: A Book of Images, Book, Chapter 1; pp 3-11 ISBN 978-3-031-33113-8 ISBN 978-3-031-33114-5 (eBook) DOI: 10.1007/978-3-031-33114-5 (Published) [pdf]
V.M. Chavez-Perez, J.A. Añel, R. R. Garcia, P. Sacha, L. de la Torre (2022) Impact of Increased Vertical Resolution in WACCM on the Climatology of Major Sudden Stratospheric Warmings, Atmosphere, Vol. 13 Issue: 4 ; DOI: 10.3390/atmos13040546 (Published) [pdf]
S. Bayo-Besteiro, M. García-Rodríguez, X. Labandeira, J.A. Añel (2021) Seasonal and subseasonal wind power characterisation and forecasting for the Iberian Peninsula and the Canary islands: a systematic review, International Journal of Climatology, Review? Vol. XXXX Issue XXXX ; DOI: 10.1002/joc.7359 (Published) [pdf]
P. Pisoft, P. Sacha, L. M. Polvani, J.A. Añel, L. de la Torre, R. Eichinger, U. Foelsche, P. Huszar, C. Jacobi, J. Karlicky, A. Kuchař, J. Miksovsky, M. Zak, H. E. Rieder (2021) Stratospheric contraction caused by increasing greenhouse gases, Environmental Research Letters, Vol. 16, 6, DOI: 10.1088/1748-9326/abfe2b (Published) [pdf]
J.A. Añel, M. García-Rodríguez, J. Rodeiro Iglesias (2021) Current status on the need for improved accessibility to climate models code, Geoscientific Model Development, Vol. 14, 923-934; DOI: 10.5194/gmd-14-923-2021 (Published) [pdf]
L. de la Torre, J.A. Añel (2020) Connections between the earth’s atmosphere and its magnetosphere, Contemporary Physics, DOI: https://doi.org/10.1080/00107514.2020.1860136 (Published) [pdf]
D. Montes, J.A. Añel, D.C.H. Wallom, P. Uhe, P. V. Caderno, T. F. Pena (2020) Cloud Computing for Climate Modelling: Evaluation, Challenges and Benefits, Computers, Vol. 9 Issue 2, 52 DOI: https://doi.org/10.3390/computers9020052 (Published) [pdf]
J.A. Añel, D. Montes, J. Rodeiro Iglesias (2020) Cloud and Serverless Computing for Scientists, Book, Springer ISBN 978-3-030-41784-0 (Published) [pdf]
G. A. González-Reyes, S. Bayo-Besteiro, J. Vich LLobet, J.A. Añel (2020) Environmental and Economic Constraints on the Use of Lubricant Oils for Wind and Hydropower Generation: The Case of NATURGY, Sustainability, Vol. 12 Issue 10 DOI: https://doi.org/10.3390/su12104242 (Published) [pdf]
C. M. Goodess, A. Troccoli, C. Acton, J.A. Añel, P. E. Bett, D. J. Brayshaw, M.De Felice, S.R.Dorling, L. Dubus, L. Penny, B. Percy, T. Ranchin, C. Thomas, M. Trolliet, L. Wald (2019) Advancing climate services for the European renewable energy sector through capacity building and user engagement, Climate Services, Vol. 16 DOI: https://doi.org/10.1016/j.cliser.2019.100139 (Published) [pdf]
J.A. Añel, A. Robock (2019) Book Review: Crossing the red line: the nuclear option, Contemporary Physics, Vol: 60 Issue: 3 DOI: https://doi.org/10.1080/00107514.2019.1663935 (Published) [pdf]
P. Sacha, R. Eichinger, H. Garny, P. Pisoft, S. Dietmüller, L. de la Torre, D. A. Plummer, P. Jöckel, O. Morgenstern, G. Zeng, N. Butchart, J.A. Añel (2019) Extratropical age of air trends and causative factors in climate projection simulations, Atmospheric Chemistry & Physics, June 2019, Vol. 19, Issue 11, Pages 7627-7647, DOI: https://doi.org/10.5194/acp-19-7627-2019 (Published) [pdf]
J.A. Añel (2019) Reflections on the Scientific Method at the beginning of the twenty-first century, Contemporary Physics, Mar 2019, Essay Review, DOI: https://doi.org/10.1080/00107514.2019.1579863 (Published) [pdf]
F. Santos, M. Gómez-Gesteira, M. deCastro, J.A. Añel, D. Carvalho, X. Costoya, J.M. Dias (2018) On the accuracy of CORDEX RCMs to project future winds over the Iberian Peninsula and surrounding ocean, Applied Energy, Volume 228, 15 October 2018, Pages 289–300 (Published) [pdf]
F. Mandija, V.M. Chavez-Perez, R. Nieto, M. Sicard, V. Danylevsky, J.A. Añel, L. Gimeno (2018) The climatology of dust events over the European continent using data of the BSC-DREAM8b model, Atmospheric Research, Volume 209, 1 September 2018, Pages 144-162, https://doi.org/10.1016/j.atmosres.2018.03.006 (Published) [pdf]
J.A. Añel, G. Sáenz, I.A. Ramírez-González, E. Polychroniadou, R. Vidal-Mina, L. Gimeno, L. de la Torre (2017) Obtaining meteorological data from historical newspapers: La Integridad, Weather, 10.1002/wea.2841 (Published) [pdf]
J.A. Añel, M. Fernández-González, X. Labandeira, X. López-Otero, L. de la Torre (2017) Impact of Cold Waves and Heat Waves on the Energy Production Sector, Atmosphere, 8(11), 209; doi:10.3390/atmos8110209 (Published) [pdf]
J.A. Añel (2017) Advanced computational fluid and aerodynamics, by P. G. Tucker, Contemporary Physics, http://dx.doi.org/10.1080/00107514.2017.1381766 (Published) [pdf]
J.A. Añel (2017) Comment on “Most computational hydrology is not reproducible, so is it really science?” by Christopher Hutton et al., Water Resources Research, 53, 2572–2574, DOI: 10.1002/2016WR020190 (Published) [pdf]
M.I. Hegglin, S. Tegtmeier, J.A. Añel, et al. (2017) The SPARC Data Initiative: Assessment of stratospheric trace gas and aerosol climatologies from satellite limb sounders, SPARC Report, No. 8, WCRP-5/2017 (Published) [pdf]
M. Diallo, B. Legras, E. Ray, A. Engel, J.A. Añel (2017) Global distribution of CO2 in the upper troposphere and stratosphere, Atmospheric Chemistry & Physics, 17, 3861-3878, doi:10.5194/acp-17-3861-2017 (Published) [pdf]
J.A. Añel (2017) Copernicus: a very short introduction, by Owen Gingerich, Contemporary Physics, doi:10.1080/00107514.2017.1292317 (Published) [pdf]
D. Montes, J.A. Añel, T.F. Pena, P. Uhe, D.C.H. Wallom (2017) Enabling BOINC in infrastructure as a service cloud system, Geoscientific Model Development, 10, 811-826, doi:10.5194/gmd-10-811-2017 (Published) [pdf]
X. Chen, B. Škerlak, M.W. Rotach, J.A. Añel, Z. Su, Y. Ma, M. Li (2016) Reasons for the Extremely High-Ranging Planetary Boundary Layer over the Western Tibetan Plateau in Winter, Journal of Atmospheric Sciences, Vol. 73, Issue 5, doi: 10.1175/JAS-D-15-0148.1, Pages: 2021-2038 (Published) [pdf]
G. Chiodo, R. Garcia-Herrera, N. Calvo, J.M. Vaquero, J.A. Añel, D. Barriopedro, K. Matthes (2016) The impact of a future solar minimum on climate change projections in the Northern Hemisphere, Environmental Research Letters, Vol: 11 Issue: 3 doi: 10.1088/1748-9326/11/3/034015 Pages: 1-14 (Published) [pdf]
J.A. Añel (2016) Atmospheric ozone: historical background and state-of-the-art, by P. Fabian and M. Dameris, Contemporary Physics, doi: 10.1080/00107514.2016.1156748 Pages: 1-3 (Published) [pdf]
J.A. Añel (2015) The stratosphere: history and future a century after its discovery, Contemporary Physics, DOI:10.1080/00107514.2015.1029521 (Published) [pdf]
J.A. Añel (2015) On the importance of weather and climate change for our present and future energy needs, edited by Troccoli, Dubus and Ellen Haupt, Contemporary Physics, DOI:10.1080/00107514.2015.1006251 (Published) [pdf]
J.A. Añel (2014) Mesoscale-Convective Processes in the Atmosphere, by Robert J. Trapp, Contemporary Physics, Vol. 55, Issue 2, Pages 149-150, DOI: 10.1080/00107514.2014.885577 (Published) [pdf]
J.A. Añel, J.I. Lopez-Moreno, F.E.L. Otto, S. Vicente-Serrano, N. Schaller, N. Massey, S.T. Buisán, M.R. Allen (2014) The extreme snow accumulation in the western Spanish Pyrenees during winter and spring 2013, in Explaining Extreme Events of 2013 from a Climate Perspective, Bulletin of the American Meteorological Society, 95(9), S73-S75 (Published) [pdf]
J.A. Añel (2013) Fundamentals of Geophysical Fluid Dynamics, by James C. McWilliams, Contemporary Physics, Volume 54, Issue 2, pages 114-115, DOI:10.1080/00107514.2013.800138 (Published) [pdf]
J.A. Añel (2013) Turing: Pioneer of the Information Age, by B. Jack Copeland, Contemporary Physics, Volume 54, Issue 5, page 259, DOI: 10.1080/00107514.2013.836246 (Published) [pdf]
M. Toohey, M.I. Hegglin, S. Tegtmeier, J. Anderson, J.A. Añel, A. Bourassa, S. Brohede, D. Degenstein, L. Froidevaux, R. Fuller, B. Funke, J. Gille, A. Jones, Y. Kasai, K. Krüger, E. Kyrölä, J. L. Neu, A. Rozanov, L. Smith, J. Urban, T. von Clarmann, K.A. Walker, R.H.J. Wang (2013) Characterizing sampling biases in the trace gas climatologies of the SPARC Data Initiative, Journal of Geophysical Research: Atmospheres, Vol. 118, Issue 20, doi:10.1002/jgrd.50874, 11.847–11.862 (Published) [pdf]
J.A. Añel, D.R. Allen, G. Sáenz, L. Gimeno, L. de la Torre (2013) Equivalent Latitude Computation Using Regions of Interest (ROI), PLoS ONE, Volumen 8, Issue 9, doi:10.1371/journal.pone.0072970 (Published) [pdf]
R.M. Trigo, J.A. Añel, D. Barriopedro, R. Garcia-Herrera, L. Gimeno, R. Nieto, R. Castillo, M.R. Allen, N. Massey (2013) The record winter drought of 2011-2012 in the Iberian Peninsula, Bulletin of the American Meteorological Society, Soc., 94(9), S41-S45 (Published) [pdf]
X. Chen, J.A. Añel, Z. Su, L. de la Torre, H. Kelder, J. van Peet, Y. Ma (2013) The Deep Atmospheric Boundary Layer and Its Significance to the Stratosphere and Troposphere Exchange over the Tibetan Plateau, PLoS ONE, 8(2): e56909. doi:10.1371/journal.pone.0056909 (Published) [pdf]
J.A. Añel, M. Blanco, L. de la Torre, L. Gimeno (2012) Recovery of meteorological data for the observatory of A Guarda, Spain, PLoS ONE, 7(6): e39281. doi:10.1371/journal.pone.0039281 (Published) [pdf]
J.A. Añel, L. de la Torre, L. Gimeno (2012) On the origin of the air between multiple tropopauses in mid-latitudes, The Scientific World Journal, vol. 2012, Article ID 191028, 5 pages. doi:10.1100/2012/191028 (Published) [pdf]
J.A. Añel (2011) The Importance of Reviewing the Code, Communications of the ACM, Vol. 54 No. 5, Pages 40-41 10.1145/1941487.1941502 (Published) [pdf]
A. Gettelman, M. Hegglin, S.W. Son, M. Fujiwara, S. Tilmes, L. Pan, P. Hoor, H. Lee, G. Manney, T. Birner, G. Stiller, M. Rex, S. Kremser, D. Wuebbles, K. Walker, J.A. Añel (2010) Upper Troposphere and Lower Stratosphere (UTLS) in SPARC CCMVal, SPARC CCMVal Report on the Evaluation of Chemistry-Climate Models, V. Eyring, T. G. Shepherd, D. W. Waugh (Eds.), SPARC Report, No. 5, WCRP-132, WMO/TD-No. 1526 (Published) [pdf]
J.M. Castanheira, J.A. Añel, C.A.F. Marques, J.C. Antuña, M.L.R. Liberato, L. de la Torre, L. Gimeno (2010) Corregindum to Increase of upper troposphere/lower stratosphere wave baroclinicity during the second half of the 20th century, Atmospheric Chemistry & Physics, 10, 9057-9058, 2010 (Published) [pdf]
A. Gettelman, J.A. Añel, et al. (2010) Multimodel assessment of the upper troposphere and lower stratosphere: Tropics and global trends, Journal of Geophysical Research, 115, D00M08, doi:10.1029/2009JD013638 (Published) [pdf]
M. Hegglin, J.A. Añel, et al. (2010) Multimodel assessment of the upper troposphere and lower stratosphere: Extra-tropics, Journal of Geophysical Research, 115, D00M09, doi:10.1029/2010JD013884 (Published) [pdf]
J.C. Antuña, J.A. Añel, A. Sterin, L. Gimeno (2009) Profesor Zalman Makhover: a relevant contributor to early tropopause studies, Meteorologische Zeitschrift, 18(6), 573-584, doi: 10.1127/0941-2948/2009/0414 (Published) [pdf]
J.M. Castanheira, J.C. Antuña, J.A. Añel, M.L.R. Liberato, L. de la Torre, L. Gimeno (2009) Increase of upper troposphere/lower stratosphere wave baroclinicity during the second half of the 20th century, Atmospheric Chemistry & Physics, 9, 9143-9153 (Published) [pdf]
P. Ribera, C. Peña-Ortiz, J.A. Añel, L. de la Torre, L. Gimeno (2009) Quasi-biennial modulation of the Northern Hemisphere tropopause height and temperature, Journal of Geophysical Research, 114(D7), doi: 10.1029/2007JD009765 (Published) [pdf]
J.A. Añel, J.C. Antuña, L. de la Torre, J.M. Castanheira, L. Gimeno (2009) Climatological features of global multiple tropopause events, Journal of Geophysical Research, 114(D7), doi:10.1029/2007JD009697 (Published) [pdf]
J.A. Añel, L. Gimeno, L. de la Torre, R.R. García (2008) Climate Modelling and Supercomputing: WACCM at CESGA, DIXITOS, Computational Science, Papers on Computational Science, 2(5), 31-32 (Published) [pdf]
L. de la Torre, R. Nieto, M. Noguerol, J.A. Añel, L. Gimeno (2008) A climatology based on reanalysis of baroclinic developmental regions in the extratropical Northern Hemisphere, Annals of the New York Academy of Sciences, Special Issue ‘Trends and Directions in Climate Research\ (Published) [pdf]
J.A. Añel, J.C. Antuña, L. de la Torre, J.M. Castanheira, L. Gimeno (2008) Climatological features of global multiple tropopause events, Journal of Geophysical Research, 113, D00B08, doi:10.1029/2007JD009697 (Published) [pdf]
P. Ribera, C. Peña-Ortiz, J.A. Añel, L. de la Torre, L. Gimeno (2008) Quasi-biennial modulation of the Northern Hemisphere tropopause height and temperature, Journal of Geophysical Research, 113, doi: DOI: 10.1029/2007JD009765 (Published) [pdf]
R. Nieto, L. Gimeno, J.A. Añel, L. de la Torre, D. Gallego, D. Barriopedro, M.C. Gallego, A. Gordillo, A. Redaño, G. Delgado (2007) Analysis of the precipitation and cloudiness associated with COLs occurrence in the Iberian Peninsula, Meteorology and Atmospheric Physics, 96, 103-119 (doi 10.1007/s00703-006-0223-6) (Published) [pdf]
J.A. Añel, J.C. Antuña, L. de la Torre, R. Nieto, L. Gimeno, P. Ribera (2007) Global statistics of multiple tropopauses from the IGRA database, Geophysical Research Letters, 34, L06709-1-5 (doi: 10.1029/2006GL029224) (Published) [pdf]
L. de la Torre, L. Gimeno, J.A. Añel, R. Nieto (2007) The role of the solar cycle on the NAO signature in Northern Hemisphere surface temperature, Advances in Atmospheric Sciences, 24(2), 191-198 (doi: 10.1007/s00376-007-0191-x) (Published) [pdf]
J.C. Antuña, J.A. Añel, L. Gimeno (2006) Impact of missing sounding reports on mandatory levels and tropopause statistics: a case study. Angeo Communicates, Annales Geophysicae, 24, 2445-2449 (Published) [pdf]
J.A. Añel, L. Gimeno, L. de la Torre, R. Nieto (2006) Changes in the tropopause height for the Eurasian region from CARDS radiosonde data, Naturwissenschaften, 93, 603-609; doi 10.1007/s00114-006-0147-5 (Published) [pdf]
L. de la Torre, L. Gimeno, J.A. Añel, R. Nieto (2006) Study of troposphere-stratosphere coupling through the Northern Annular Mode, Journal of Atmospheric and Solar-Terrestrial Physics, 68, 989-998 (doi:10.1016/j.jastp.2005.12.003) (Published) [pdf]
L. de la Torre, L. Gimeno, J.A. Añel, R. Nieto (2006) Solar Influence on the Northern Annular Mode Spatial Structure and QBO modulation, Advances in Space Research, 37, 1635-1639 (doi: 10.1016/j.asr.2005.05.018) (Published) [pdf]
N.O. García, L. Gimeno, L. de la Torre, R. Nieto, J.A. Añel (2005) North Atlantic Oscillation (NAO) and precipitation in Galicia (Spain), Atmósfera, 18-1, 25-32 (Published) [pdf]
L. de la Torre, P. Ribera, L. Gimeno, J.A. Añel, R. Nieto (2004) Utilización del momento angular relativo para el estudio de NAO/AO, Física de la Tierra, 16, 73-82 (Published) [pdf]